At the international level, he represents Korea DPR U20. He plays primarily as a Midfield. He stands at 180cm tall and weighs 69kg.

Across 3 appearances in the AFC U20 Asian Cup 2024-2025, Su-ung·Yun registered 0 goals and 0 assists, while completing 0 key passes out of 66 total passes with a passing accuracy of 16.7.