diff --git a/src/compiler/transformers/esnext.ts b/src/compiler/transformers/esnext.ts
index ab3ecdc9228..2300feeb0e2 100644
--- a/src/compiler/transformers/esnext.ts
+++ b/src/compiler/transformers/esnext.ts
@@ -24,7 +24,7 @@ namespace ts {
                 case SyntaxKind.ElementAccessExpression:
                 case SyntaxKind.CallExpression:
                     if (node.flags & NodeFlags.OptionalChain) {
-                        const updated = visitOptionalExpression(node as OptionalChain, /*captureThisArg*/ false);
+                        const updated = visitOptionalExpression(node as OptionalChain, /*captureThisArg*/ false, /*isDelete*/ false);
                         Debug.assertNotNode(updated, isSyntheticReference);
                         return updated;
                     }
@@ -34,6 +34,8 @@ namespace ts {
                         return transformNullishCoalescingExpression(<BinaryExpression>node);
                     }
                     return visitEachChild(node, visitor, context);
+                case SyntaxKind.DeleteExpression:
+                    return visitDeleteExpression(node as DeleteExpression);
                 default:
                     return visitEachChild(node, visitor, context);
             }
@@ -48,8 +50,8 @@ namespace ts {
             return { expression: chain.expression, chain: links };
         }
 
-        function visitNonOptionalParenthesizedExpression(node: ParenthesizedExpression, captureThisArg: boolean): Expression {
-            const expression = visitNonOptionalExpression(node.expression, captureThisArg);
+        function visitNonOptionalParenthesizedExpression(node: ParenthesizedExpression, captureThisArg: boolean, isDelete: boolean): Expression {
+            const expression = visitNonOptionalExpression(node.expression, captureThisArg, isDelete);
             if (isSyntheticReference(expression)) {
                 // `(a.b)` -> { expression `((_a = a).b)`, thisArg: `_a` }
                 // `(a[b])` -> { expression `((_a = a)[b])`, thisArg: `_a` }
@@ -58,10 +60,10 @@ namespace ts {
             return updateParen(node, expression);
         }
 
-        function visitNonOptionalPropertyOrElementAccessExpression(node: AccessExpression, captureThisArg: boolean): Expression {
+        function visitNonOptionalPropertyOrElementAccessExpression(node: AccessExpression, captureThisArg: boolean, isDelete: boolean): Expression {
             if (isOptionalChain(node)) {
                 // If `node` is an optional chain, then it is the outermost chain of an optional expression.
-                return visitOptionalExpression(node, captureThisArg);
+                return visitOptionalExpression(node, captureThisArg, isDelete);
             }
 
             let expression: Expression = visitNode(node.expression, visitor, isExpression);
@@ -87,24 +89,24 @@ namespace ts {
         function visitNonOptionalCallExpression(node: CallExpression, captureThisArg: boolean): Expression {
             if (isOptionalChain(node)) {
                 // If `node` is an optional chain, then it is the outermost chain of an optional expression.
-                return visitOptionalExpression(node, captureThisArg);
+                return visitOptionalExpression(node, captureThisArg, /*isDelete*/ false);
             }
             return visitEachChild(node, visitor, context);
         }
 
-        function visitNonOptionalExpression(node: Expression, captureThisArg: boolean): Expression {
+        function visitNonOptionalExpression(node: Expression, captureThisArg: boolean, isDelete: boolean): Expression {
             switch (node.kind) {
-                case SyntaxKind.ParenthesizedExpression: return visitNonOptionalParenthesizedExpression(node as ParenthesizedExpression, captureThisArg);
+                case SyntaxKind.ParenthesizedExpression: return visitNonOptionalParenthesizedExpression(node as ParenthesizedExpression, captureThisArg, isDelete);
                 case SyntaxKind.PropertyAccessExpression:
-                case SyntaxKind.ElementAccessExpression: return visitNonOptionalPropertyOrElementAccessExpression(node as AccessExpression, captureThisArg);
+                case SyntaxKind.ElementAccessExpression: return visitNonOptionalPropertyOrElementAccessExpression(node as AccessExpression, captureThisArg, isDelete);
                 case SyntaxKind.CallExpression: return visitNonOptionalCallExpression(node as CallExpression, captureThisArg);
                 default: return visitNode(node, visitor, isExpression);
             }
         }
 
-        function visitOptionalExpression(node: OptionalChain, captureThisArg: boolean): Expression {
+        function visitOptionalExpression(node: OptionalChain, captureThisArg: boolean, isDelete: boolean): Expression {
             const { expression, chain } = flattenChain(node);
-            const left = visitNonOptionalExpression(expression, isCallChain(chain[0]));
+            const left = visitNonOptionalExpression(expression, isCallChain(chain[0]), /*isDelete*/ false);
             const leftThisArg = isSyntheticReference(left) ? left.thisArg : undefined;
             let leftExpression = isSyntheticReference(left) ? left.expression : left;
             let capturedLeft: Expression = leftExpression;
@@ -152,11 +154,9 @@ namespace ts {
                 setOriginalNode(rightExpression, segment);
             }
 
-            const target = createConditional(
-                createNotNullCondition(leftExpression, capturedLeft, /*invert*/ true),
-                createVoidZero(),
-                rightExpression,
-            );
+            const target = isDelete
+                ? createConditional(createNotNullCondition(leftExpression, capturedLeft, /*invert*/ true), createTrue(), createDelete(rightExpression))
+                : createConditional(createNotNullCondition(leftExpression, capturedLeft, /*invert*/ true), createVoidZero(), rightExpression);
             return thisArg ? createSyntheticReferenceExpression(target, thisArg) : target;
         }
 
@@ -197,5 +197,11 @@ namespace ts {
                 expression.kind !== SyntaxKind.ThisKeyword &&
                 expression.kind !== SyntaxKind.SuperKeyword;
         }
+
+        function visitDeleteExpression(node: DeleteExpression) {
+            return isOptionalChain(skipParentheses(node.expression))
+                ? setOriginalNode(visitNonOptionalExpression(node.expression, /*captureThisArg*/ false, /*isDelete*/ true), node)
+                : updateDelete(node, visitNode(node.expression, visitor, isExpression));
+        }
     }
 }
diff --git a/tests/baselines/reference/deleteChain.js b/tests/baselines/reference/deleteChain.js
new file mode 100644
index 00000000000..1cf168d2724
--- /dev/null
+++ b/tests/baselines/reference/deleteChain.js
@@ -0,0 +1,42 @@
+//// [deleteChain.ts]
+declare const o1: undefined | { b: string };
+delete o1?.b;
+delete (o1?.b);
+
+declare const o2: undefined | { b: { c: string } };
+delete o2?.b.c;
+delete (o2?.b.c);
+
+declare const o3: { b: undefined | { c: string } };
+delete o3.b?.c;
+delete (o3.b?.c);
+
+declare const o4: { b?: { c: { d?: { e: string } } } };
+delete o4.b?.c.d?.e;
+delete (o4.b?.c.d)?.e;
+delete (o4.b?.c.d?.e);
+
+declare const o5: { b?(): { c: { d?: { e: string } } } };
+delete o5.b?.().c.d?.e;
+delete (o5.b?.().c.d?.e);
+
+declare const o6: { b?: { c: { d?: { e: string } } } };
+delete o6.b?.['c'].d?.['e'];
+delete (o6.b?.['c'].d?.['e']);
+
+//// [deleteChain.js]
+"use strict";
+var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o, _p, _q, _r;
+o1 === null || o1 === void 0 ? true : delete o1.b;
+(o1 === null || o1 === void 0 ? true : delete o1.b);
+o2 === null || o2 === void 0 ? true : delete o2.b.c;
+(o2 === null || o2 === void 0 ? true : delete o2.b.c);
+(_a = o3.b) === null || _a === void 0 ? true : delete _a.c;
+((_b = o3.b) === null || _b === void 0 ? true : delete _b.c);
+(_d = (_c = o4.b) === null || _c === void 0 ? void 0 : _c.c.d) === null || _d === void 0 ? true : delete _d.e;
+(_f = ((_e = o4.b) === null || _e === void 0 ? void 0 : _e.c.d)) === null || _f === void 0 ? true : delete _f.e;
+((_h = (_g = o4.b) === null || _g === void 0 ? void 0 : _g.c.d) === null || _h === void 0 ? true : delete _h.e);
+(_k = (_j = o5.b) === null || _j === void 0 ? void 0 : _j.call(o5).c.d) === null || _k === void 0 ? true : delete _k.e;
+((_m = (_l = o5.b) === null || _l === void 0 ? void 0 : _l.call(o5).c.d) === null || _m === void 0 ? true : delete _m.e);
+(_p = (_o = o6.b) === null || _o === void 0 ? void 0 : _o['c'].d) === null || _p === void 0 ? true : delete _p['e'];
+((_r = (_q = o6.b) === null || _q === void 0 ? void 0 : _q['c'].d) === null || _r === void 0 ? true : delete _r['e']);
diff --git a/tests/baselines/reference/deleteChain.symbols b/tests/baselines/reference/deleteChain.symbols
new file mode 100644
index 00000000000..7efc0abae47
--- /dev/null
+++ b/tests/baselines/reference/deleteChain.symbols
@@ -0,0 +1,143 @@
+=== tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts ===
+declare const o1: undefined | { b: string };
+>o1 : Symbol(o1, Decl(deleteChain.ts, 0, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 0, 31))
+
+delete o1?.b;
+>o1?.b : Symbol(b, Decl(deleteChain.ts, 0, 31))
+>o1 : Symbol(o1, Decl(deleteChain.ts, 0, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 0, 31))
+
+delete (o1?.b);
+>o1?.b : Symbol(b, Decl(deleteChain.ts, 0, 31))
+>o1 : Symbol(o1, Decl(deleteChain.ts, 0, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 0, 31))
+
+declare const o2: undefined | { b: { c: string } };
+>o2 : Symbol(o2, Decl(deleteChain.ts, 4, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 4, 31))
+>c : Symbol(c, Decl(deleteChain.ts, 4, 36))
+
+delete o2?.b.c;
+>o2?.b.c : Symbol(c, Decl(deleteChain.ts, 4, 36))
+>o2?.b : Symbol(b, Decl(deleteChain.ts, 4, 31))
+>o2 : Symbol(o2, Decl(deleteChain.ts, 4, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 4, 31))
+>c : Symbol(c, Decl(deleteChain.ts, 4, 36))
+
+delete (o2?.b.c);
+>o2?.b.c : Symbol(c, Decl(deleteChain.ts, 4, 36))
+>o2?.b : Symbol(b, Decl(deleteChain.ts, 4, 31))
+>o2 : Symbol(o2, Decl(deleteChain.ts, 4, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 4, 31))
+>c : Symbol(c, Decl(deleteChain.ts, 4, 36))
+
+declare const o3: { b: undefined | { c: string } };
+>o3 : Symbol(o3, Decl(deleteChain.ts, 8, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 8, 19))
+>c : Symbol(c, Decl(deleteChain.ts, 8, 36))
+
+delete o3.b?.c;
+>o3.b?.c : Symbol(c, Decl(deleteChain.ts, 8, 36))
+>o3.b : Symbol(b, Decl(deleteChain.ts, 8, 19))
+>o3 : Symbol(o3, Decl(deleteChain.ts, 8, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 8, 19))
+>c : Symbol(c, Decl(deleteChain.ts, 8, 36))
+
+delete (o3.b?.c);
+>o3.b?.c : Symbol(c, Decl(deleteChain.ts, 8, 36))
+>o3.b : Symbol(b, Decl(deleteChain.ts, 8, 19))
+>o3 : Symbol(o3, Decl(deleteChain.ts, 8, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 8, 19))
+>c : Symbol(c, Decl(deleteChain.ts, 8, 36))
+
+declare const o4: { b?: { c: { d?: { e: string } } } };
+>o4 : Symbol(o4, Decl(deleteChain.ts, 12, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 12, 19))
+>c : Symbol(c, Decl(deleteChain.ts, 12, 25))
+>d : Symbol(d, Decl(deleteChain.ts, 12, 30))
+>e : Symbol(e, Decl(deleteChain.ts, 12, 36))
+
+delete o4.b?.c.d?.e;
+>o4.b?.c.d?.e : Symbol(e, Decl(deleteChain.ts, 12, 36))
+>o4.b?.c.d : Symbol(d, Decl(deleteChain.ts, 12, 30))
+>o4.b?.c : Symbol(c, Decl(deleteChain.ts, 12, 25))
+>o4.b : Symbol(b, Decl(deleteChain.ts, 12, 19))
+>o4 : Symbol(o4, Decl(deleteChain.ts, 12, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 12, 19))
+>c : Symbol(c, Decl(deleteChain.ts, 12, 25))
+>d : Symbol(d, Decl(deleteChain.ts, 12, 30))
+>e : Symbol(e, Decl(deleteChain.ts, 12, 36))
+
+delete (o4.b?.c.d)?.e;
+>(o4.b?.c.d)?.e : Symbol(e, Decl(deleteChain.ts, 12, 36))
+>o4.b?.c.d : Symbol(d, Decl(deleteChain.ts, 12, 30))
+>o4.b?.c : Symbol(c, Decl(deleteChain.ts, 12, 25))
+>o4.b : Symbol(b, Decl(deleteChain.ts, 12, 19))
+>o4 : Symbol(o4, Decl(deleteChain.ts, 12, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 12, 19))
+>c : Symbol(c, Decl(deleteChain.ts, 12, 25))
+>d : Symbol(d, Decl(deleteChain.ts, 12, 30))
+>e : Symbol(e, Decl(deleteChain.ts, 12, 36))
+
+delete (o4.b?.c.d?.e);
+>o4.b?.c.d?.e : Symbol(e, Decl(deleteChain.ts, 12, 36))
+>o4.b?.c.d : Symbol(d, Decl(deleteChain.ts, 12, 30))
+>o4.b?.c : Symbol(c, Decl(deleteChain.ts, 12, 25))
+>o4.b : Symbol(b, Decl(deleteChain.ts, 12, 19))
+>o4 : Symbol(o4, Decl(deleteChain.ts, 12, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 12, 19))
+>c : Symbol(c, Decl(deleteChain.ts, 12, 25))
+>d : Symbol(d, Decl(deleteChain.ts, 12, 30))
+>e : Symbol(e, Decl(deleteChain.ts, 12, 36))
+
+declare const o5: { b?(): { c: { d?: { e: string } } } };
+>o5 : Symbol(o5, Decl(deleteChain.ts, 17, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 17, 19))
+>c : Symbol(c, Decl(deleteChain.ts, 17, 27))
+>d : Symbol(d, Decl(deleteChain.ts, 17, 32))
+>e : Symbol(e, Decl(deleteChain.ts, 17, 38))
+
+delete o5.b?.().c.d?.e;
+>o5.b?.().c.d?.e : Symbol(e, Decl(deleteChain.ts, 17, 38))
+>o5.b?.().c.d : Symbol(d, Decl(deleteChain.ts, 17, 32))
+>o5.b?.().c : Symbol(c, Decl(deleteChain.ts, 17, 27))
+>o5.b : Symbol(b, Decl(deleteChain.ts, 17, 19))
+>o5 : Symbol(o5, Decl(deleteChain.ts, 17, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 17, 19))
+>c : Symbol(c, Decl(deleteChain.ts, 17, 27))
+>d : Symbol(d, Decl(deleteChain.ts, 17, 32))
+>e : Symbol(e, Decl(deleteChain.ts, 17, 38))
+
+delete (o5.b?.().c.d?.e);
+>o5.b?.().c.d?.e : Symbol(e, Decl(deleteChain.ts, 17, 38))
+>o5.b?.().c.d : Symbol(d, Decl(deleteChain.ts, 17, 32))
+>o5.b?.().c : Symbol(c, Decl(deleteChain.ts, 17, 27))
+>o5.b : Symbol(b, Decl(deleteChain.ts, 17, 19))
+>o5 : Symbol(o5, Decl(deleteChain.ts, 17, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 17, 19))
+>c : Symbol(c, Decl(deleteChain.ts, 17, 27))
+>d : Symbol(d, Decl(deleteChain.ts, 17, 32))
+>e : Symbol(e, Decl(deleteChain.ts, 17, 38))
+
+declare const o6: { b?: { c: { d?: { e: string } } } };
+>o6 : Symbol(o6, Decl(deleteChain.ts, 21, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 21, 19))
+>c : Symbol(c, Decl(deleteChain.ts, 21, 25))
+>d : Symbol(d, Decl(deleteChain.ts, 21, 30))
+>e : Symbol(e, Decl(deleteChain.ts, 21, 36))
+
+delete o6.b?.['c'].d?.['e'];
+>o6.b?.['c'].d : Symbol(d, Decl(deleteChain.ts, 21, 30))
+>o6.b : Symbol(b, Decl(deleteChain.ts, 21, 19))
+>o6 : Symbol(o6, Decl(deleteChain.ts, 21, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 21, 19))
+>d : Symbol(d, Decl(deleteChain.ts, 21, 30))
+
+delete (o6.b?.['c'].d?.['e']);
+>o6.b?.['c'].d : Symbol(d, Decl(deleteChain.ts, 21, 30))
+>o6.b : Symbol(b, Decl(deleteChain.ts, 21, 19))
+>o6 : Symbol(o6, Decl(deleteChain.ts, 21, 13))
+>b : Symbol(b, Decl(deleteChain.ts, 21, 19))
+>d : Symbol(d, Decl(deleteChain.ts, 21, 30))
+
diff --git a/tests/baselines/reference/deleteChain.types b/tests/baselines/reference/deleteChain.types
new file mode 100644
index 00000000000..ab7fd8e65b1
--- /dev/null
+++ b/tests/baselines/reference/deleteChain.types
@@ -0,0 +1,173 @@
+=== tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts ===
+declare const o1: undefined | { b: string };
+>o1 : { b: string; } | undefined
+>b : string
+
+delete o1?.b;
+>delete o1?.b : boolean
+>o1?.b : string | undefined
+>o1 : { b: string; } | undefined
+>b : string | undefined
+
+delete (o1?.b);
+>delete (o1?.b) : boolean
+>(o1?.b) : string | undefined
+>o1?.b : string | undefined
+>o1 : { b: string; } | undefined
+>b : string | undefined
+
+declare const o2: undefined | { b: { c: string } };
+>o2 : { b: { c: string; }; } | undefined
+>b : { c: string; }
+>c : string
+
+delete o2?.b.c;
+>delete o2?.b.c : boolean
+>o2?.b.c : string | undefined
+>o2?.b : { c: string; } | undefined
+>o2 : { b: { c: string; }; } | undefined
+>b : { c: string; } | undefined
+>c : string | undefined
+
+delete (o2?.b.c);
+>delete (o2?.b.c) : boolean
+>(o2?.b.c) : string | undefined
+>o2?.b.c : string | undefined
+>o2?.b : { c: string; } | undefined
+>o2 : { b: { c: string; }; } | undefined
+>b : { c: string; } | undefined
+>c : string | undefined
+
+declare const o3: { b: undefined | { c: string } };
+>o3 : { b: { c: string; } | undefined; }
+>b : { c: string; } | undefined
+>c : string
+
+delete o3.b?.c;
+>delete o3.b?.c : boolean
+>o3.b?.c : string | undefined
+>o3.b : { c: string; } | undefined
+>o3 : { b: { c: string; } | undefined; }
+>b : { c: string; } | undefined
+>c : string | undefined
+
+delete (o3.b?.c);
+>delete (o3.b?.c) : boolean
+>(o3.b?.c) : string | undefined
+>o3.b?.c : string | undefined
+>o3.b : { c: string; } | undefined
+>o3 : { b: { c: string; } | undefined; }
+>b : { c: string; } | undefined
+>c : string | undefined
+
+declare const o4: { b?: { c: { d?: { e: string } } } };
+>o4 : { b?: { c: { d?: { e: string; } | undefined; }; } | undefined; }
+>b : { c: { d?: { e: string; } | undefined; }; } | undefined
+>c : { d?: { e: string; } | undefined; }
+>d : { e: string; } | undefined
+>e : string
+
+delete o4.b?.c.d?.e;
+>delete o4.b?.c.d?.e : boolean
+>o4.b?.c.d?.e : string | undefined
+>o4.b?.c.d : { e: string; } | undefined
+>o4.b?.c : { d?: { e: string; } | undefined; } | undefined
+>o4.b : { c: { d?: { e: string; } | undefined; }; } | undefined
+>o4 : { b?: { c: { d?: { e: string; } | undefined; }; } | undefined; }
+>b : { c: { d?: { e: string; } | undefined; }; } | undefined
+>c : { d?: { e: string; } | undefined; } | undefined
+>d : { e: string; } | undefined
+>e : string | undefined
+
+delete (o4.b?.c.d)?.e;
+>delete (o4.b?.c.d)?.e : boolean
+>(o4.b?.c.d)?.e : string | undefined
+>(o4.b?.c.d) : { e: string; } | undefined
+>o4.b?.c.d : { e: string; } | undefined
+>o4.b?.c : { d?: { e: string; } | undefined; } | undefined
+>o4.b : { c: { d?: { e: string; } | undefined; }; } | undefined
+>o4 : { b?: { c: { d?: { e: string; } | undefined; }; } | undefined; }
+>b : { c: { d?: { e: string; } | undefined; }; } | undefined
+>c : { d?: { e: string; } | undefined; } | undefined
+>d : { e: string; } | undefined
+>e : string | undefined
+
+delete (o4.b?.c.d?.e);
+>delete (o4.b?.c.d?.e) : boolean
+>(o4.b?.c.d?.e) : string | undefined
+>o4.b?.c.d?.e : string | undefined
+>o4.b?.c.d : { e: string; } | undefined
+>o4.b?.c : { d?: { e: string; } | undefined; } | undefined
+>o4.b : { c: { d?: { e: string; } | undefined; }; } | undefined
+>o4 : { b?: { c: { d?: { e: string; } | undefined; }; } | undefined; }
+>b : { c: { d?: { e: string; } | undefined; }; } | undefined
+>c : { d?: { e: string; } | undefined; } | undefined
+>d : { e: string; } | undefined
+>e : string | undefined
+
+declare const o5: { b?(): { c: { d?: { e: string } } } };
+>o5 : { b?(): { c: { d?: { e: string; } | undefined; }; }; }
+>b : (() => { c: { d?: { e: string; } | undefined; }; }) | undefined
+>c : { d?: { e: string; } | undefined; }
+>d : { e: string; } | undefined
+>e : string
+
+delete o5.b?.().c.d?.e;
+>delete o5.b?.().c.d?.e : boolean
+>o5.b?.().c.d?.e : string | undefined
+>o5.b?.().c.d : { e: string; } | undefined
+>o5.b?.().c : { d?: { e: string; } | undefined; } | undefined
+>o5.b?.() : { c: { d?: { e: string; } | undefined; }; } | undefined
+>o5.b : (() => { c: { d?: { e: string; } | undefined; }; }) | undefined
+>o5 : { b?(): { c: { d?: { e: string; } | undefined; }; }; }
+>b : (() => { c: { d?: { e: string; } | undefined; }; }) | undefined
+>c : { d?: { e: string; } | undefined; } | undefined
+>d : { e: string; } | undefined
+>e : string | undefined
+
+delete (o5.b?.().c.d?.e);
+>delete (o5.b?.().c.d?.e) : boolean
+>(o5.b?.().c.d?.e) : string | undefined
+>o5.b?.().c.d?.e : string | undefined
+>o5.b?.().c.d : { e: string; } | undefined
+>o5.b?.().c : { d?: { e: string; } | undefined; } | undefined
+>o5.b?.() : { c: { d?: { e: string; } | undefined; }; } | undefined
+>o5.b : (() => { c: { d?: { e: string; } | undefined; }; }) | undefined
+>o5 : { b?(): { c: { d?: { e: string; } | undefined; }; }; }
+>b : (() => { c: { d?: { e: string; } | undefined; }; }) | undefined
+>c : { d?: { e: string; } | undefined; } | undefined
+>d : { e: string; } | undefined
+>e : string | undefined
+
+declare const o6: { b?: { c: { d?: { e: string } } } };
+>o6 : { b?: { c: { d?: { e: string; } | undefined; }; } | undefined; }
+>b : { c: { d?: { e: string; } | undefined; }; } | undefined
+>c : { d?: { e: string; } | undefined; }
+>d : { e: string; } | undefined
+>e : string
+
+delete o6.b?.['c'].d?.['e'];
+>delete o6.b?.['c'].d?.['e'] : boolean
+>o6.b?.['c'].d?.['e'] : string | undefined
+>o6.b?.['c'].d : { e: string; } | undefined
+>o6.b?.['c'] : { d?: { e: string; } | undefined; } | undefined
+>o6.b : { c: { d?: { e: string; } | undefined; }; } | undefined
+>o6 : { b?: { c: { d?: { e: string; } | undefined; }; } | undefined; }
+>b : { c: { d?: { e: string; } | undefined; }; } | undefined
+>'c' : "c"
+>d : { e: string; } | undefined
+>'e' : "e"
+
+delete (o6.b?.['c'].d?.['e']);
+>delete (o6.b?.['c'].d?.['e']) : boolean
+>(o6.b?.['c'].d?.['e']) : string | undefined
+>o6.b?.['c'].d?.['e'] : string | undefined
+>o6.b?.['c'].d : { e: string; } | undefined
+>o6.b?.['c'] : { d?: { e: string; } | undefined; } | undefined
+>o6.b : { c: { d?: { e: string; } | undefined; }; } | undefined
+>o6 : { b?: { c: { d?: { e: string; } | undefined; }; } | undefined; }
+>b : { c: { d?: { e: string; } | undefined; }; } | undefined
+>'c' : "c"
+>d : { e: string; } | undefined
+>'e' : "e"
+
diff --git a/tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts b/tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts
new file mode 100644
index 00000000000..878689704b7
--- /dev/null
+++ b/tests/cases/conformance/expressions/optionalChaining/delete/deleteChain.ts
@@ -0,0 +1,26 @@
+// @strict: true
+
+declare const o1: undefined | { b: string };
+delete o1?.b;
+delete (o1?.b);
+
+declare const o2: undefined | { b: { c: string } };
+delete o2?.b.c;
+delete (o2?.b.c);
+
+declare const o3: { b: undefined | { c: string } };
+delete o3.b?.c;
+delete (o3.b?.c);
+
+declare const o4: { b?: { c: { d?: { e: string } } } };
+delete o4.b?.c.d?.e;
+delete (o4.b?.c.d)?.e;
+delete (o4.b?.c.d?.e);
+
+declare const o5: { b?(): { c: { d?: { e: string } } } };
+delete o5.b?.().c.d?.e;
+delete (o5.b?.().c.d?.e);
+
+declare const o6: { b?: { c: { d?: { e: string } } } };
+delete o6.b?.['c'].d?.['e'];
+delete (o6.b?.['c'].d?.['e']);
\ No newline at end of file