Dee ihe na-aga n'ihu maka paragraf a - Bućan zụrụ ndị ntorobịa nwoke nke mba Serbia (n'okpuru-18, n'okpuru-19, n'okpuru 20). Na 2013 FIBA Europe Under-18 Championship, Serbia kwụsịrị nke isii n'etiti otu iri na isii. Na 2014 FIBA Europe Under-18 Championship Serbia meriri ọla ọcha. Na 2015 FIBA Under-19 World Championship
, Serbia gbara nke itoolu n'etiti otu iri na isii. Na 2016 FIBA Europe Under-20 Championship, Serbia kwụsịrị 11 n'etiti ìgwè 16.