diff --git a/gapic/generator/generator.py b/gapic/generator/generator.py
index dff8e0ebed..0aec65cc57 100644
--- a/gapic/generator/generator.py
+++ b/gapic/generator/generator.py
@@ -294,9 +294,13 @@ def _render_template(
                         ('transport' in template_name
                          and not self._is_desired_transport(template_name, opts))
                         or
-                        # TODO(yon-mg) - remove when rest async implementation resolved
-                        # temporarily stop async client gen while rest async is unkown
-                        ('async' in template_name and 'grpc' not in opts.transport)
+                        # TODO: Remove the following conditions once support for async rest transport is GA:
+                        # See related issue: https://github.com/googleapis/gapic-generator-python/issues/2121.
+                        ('async_client' in template_name and ('grpc' not in opts.transport or
+                         not api_schema.all_library_settings[api_schema.naming.proto_package].python_settings.experimental_features.rest_async_io_enabled))
+                        or
+                        ('rest_asyncio' in template_name and
+                         not api_schema.all_library_settings[api_schema.naming.proto_package].python_settings.experimental_features.rest_async_io_enabled)
                         or
                         ('rest_base' in template_name and 'rest' not in opts.transport)
                 ):
diff --git a/gapic/templates/%namespace/%name_%version/%sub/services/%service/transports/rest_asyncio.py.j2 b/gapic/templates/%namespace/%name_%version/%sub/services/%service/transports/rest_asyncio.py.j2
new file mode 100644
index 0000000000..d73591c472
--- /dev/null
+++ b/gapic/templates/%namespace/%name_%version/%sub/services/%service/transports/rest_asyncio.py.j2
@@ -0,0 +1,5 @@
+{# TODO: Remove the following condition for async rest transport once support for it is GA:
+ # {% if rest_async_io_enabled %}
+ # See related issue: https://github.com/googleapis/gapic-generator-python/issues/2121.
+#}
+{% set rest_async_io_enabled = api.all_library_settings[api.naming.proto_package].python_settings.experimental_features.rest_async_io_enabled %}