async function main(projectId, locationId, parameterId, versionId) {
  // [START parametermanager_delete_regional_param_version]
  /**
   * TODO(developer): Uncomment these variables before running the sample.
   */
  // const projectId = 'my-project';
  // const locationId = 'us-central1';
  // const parameterId = 'my-parameter';
  // const versionId = 'v1';

  // Imports the Parameter Manager library
  const {ParameterManagerClient} = require('@google-cloud/parametermanager');

  // Adding the endpoint to call the regional parameter manager server
  const options = {
    apiEndpoint: `parametermanager.${locationId}.rep.googleapis.com`,
  };

  // Instantiates a client with regional endpoint
  const client = new ParameterManagerClient(options);

  async function deleteRegionalParamVersion() {
    // Construct the fully qualified parameter version name
    const name = client.parameterVersionPath(
      projectId,
      locationId,
      parameterId,
      versionId
    );

    // Delete the parameter version
    await client.deleteParameterVersion({
      name: name,
    });
    console.log(`Deleted regional parameter version: ${name}`);
    return name;
  }

  return await deleteRegionalParamVersion();
  // [END parametermanager_delete_regional_param_version]
}
Deletes a specific version of an existing parameter in the specified region
of the specified project using the Google Cloud Parameter Manager SDK.

@param {string} projectId - The Google Cloud project ID where the parameter is located.
@param {string} locationId - The ID of the region where parameter is located.
@param {string} parameterId - The ID of the parameter for which version is to be deleted.
@param {string} versionId - The version ID of the parameter to delete.