Cika wannan jumla: Tare da tawagar 'yan kasa da shekaru 19 na kasar Canada, an zabi Barrett a matsayin MVP a gasar
2017 FIBA Under-19 Basketball World Cup bayan ya jagoranci tawagarsa zuwa lambar zinare. Ya fara bugawa manyan 'yan wasa wasa yayin cancantar gasar cin kofin duniya ta FIBA ta 2019.