Mezue ahịrịokwu na-esonụ: Miller anọchitewo anya Canada n'ọtụtụ asọmpi mba ụwa. N'ọnwa Julaị afọ 2017, ọ zọrọ asọmpi maka ndị otu Canada nke meriri nrite ọla edo na
FIBA U19 World Cup. Miller na-enweta akara 1.6 na rebounds 1.7 n'otu egwuregwu. Na June 2018, ọ bụ isi ihe maka ndị otu Canada nke weghaara ọla ọcha na FIBA U18 Americas Championship. Miller nwere akara 17.3, 7.3 rebounds, 1.5 na-enyere aka na 1.2 na-ezu ohi kwa egwuregwu. Na mmeri ọkara ikpeazụ megide Puerto Rico, o nwetara akara 31 na 14 rebounds.