> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v23** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/reference/rpc/latest/PolicyTopicConstraint.CountryConstraint).

Indicates that a resource's ability to serve in a particular country is constrained.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v23/common/policy.proto)

| Fields ||
|---|---|
| ## `country_criterion` | `string` Geo target constant resource name of the country in which serving is constrained. |