Dudić played six matches for FR Yugoslavia under-21 in the 2000 UEFA European Under-21 Championship qualification, including the playoff against England, losing 3–0. He was selected by Vujadin Boškov for a friendly against China on 25 May 2000, and received his first cap during the match.
Dudić played six matches for the FR Yugoslavia under-21 team during their qualification campaign for the 2000 UEFA European Under-21 Championship, including a playoff against England which they lost 3–0. He was chosen by Vujadin Boškov to play in a friendly match against China on May 25, 2000, and earned his first cap during that game.