Kammala jumla mai zuwa: Bućan ya horar da zaɓaɓɓun matasa na ƙungiyar ƙwallon ƙafa ta Serbia (ƙaramin shekaru 18, ƙaramin shekaru 19, ƙaramin shekaru 20). A 2013 FIBA Turai Under-18 Championship, Serbia ta gama 6th tsakanin kungiyoyi 16. A 2014 FIBA Turai Under-18 Championship Serbia ta lashe lambar azurfa. A cikin
2015 FIBA Under-19 Gasar cin Kofin Duniya, Serbia ta gama 9th tsakanin kungiyoyi 16. A Gasar FIBA ta Turai ta 2016 a karkashin 20, Serbia ta kammala na 11 a tsakanin kungiyoyi 16.