Folks, how to handle error handling if ssm parameter not found? is there any way of handling exceptions if parameter not found? What i am getting in my code is invocation of ‘PARAMETER’ returned an error and doesn’t execute else part. Any help?

This is not currently supported (https://github.com/pulumi/pulumi/issues/3364 tracks adding support for this), but you can use the AWS SDK directly to do your "get" and handle the "not found" that way.