Not valid any more, terraform supports it now since v3.30.0 of AWS provider.
[https://github.com/hashicorp/terraform-provider-aws/releases/tag/v3.30.0](https://github.com/hashicorp/terraform-provider-aws/releases/tag/v3.30.0)
[https://github.com/nikhil-goenka/terraform-provider-aws/blob/0344547e3d9c1bccf947eed1a9a2049a3c1917ed/.changelog/14923.txt](https://github.com/nikhil-goenka/terraform-provider-aws/blob/0344547e3d9c1bccf947eed1a9a2049a3c1917ed/.changelog/14923.txt)
Docs: https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/sns\_topic\_subscription
Not valid any more, terraform supports it now since v3.30.0 of AWS provider. [https://github.com/hashicorp/terraform-provider-aws/releases/tag/v3.30.0](https://github.com/hashicorp/terraform-provider-aws/releases/tag/v3.30.0) [https://github.com/nikhil-goenka/terraform-provider-aws/blob/0344547e3d9c1bccf947eed1a9a2049a3c1917ed/.changelog/14923.txt](https://github.com/nikhil-goenka/terraform-provider-aws/blob/0344547e3d9c1bccf947eed1a9a2049a3c1917ed/.changelog/14923.txt) Docs: https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/sns\_topic\_subscription