diff --git a/codegen/smithy-aws-typescript-codegen/src/main/resources/software/amazon/smithy/aws/typescript/codegen/endpoints.json b/codegen/smithy-aws-typescript-codegen/src/main/resources/software/amazon/smithy/aws/typescript/codegen/endpoints.json
index c671d3f43105..e46534ed75c8 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/resources/software/amazon/smithy/aws/typescript/codegen/endpoints.json
+++ b/codegen/smithy-aws-typescript-codegen/src/main/resources/software/amazon/smithy/aws/typescript/codegen/endpoints.json
@@ -3440,6 +3440,7 @@
             "ap-south-1": {},
             "ap-southeast-1": {},
             "ap-southeast-2": {},
+            "ap-southeast-3": {},
             "ca-central-1": {
               "variants": [
                 {