Kammala jumla mai zuwa: Wembanyama ya wakilci Faransa a Gasar Zakarun Turai ta FIBA U16 ta 2019 a Udine, Italiya. A cikin wasan kusa da na karshe da Croatia suka yi a 80-78, ya yi rikodin maki 12, 21 ya sake dawowa da kuma toshe takwas. Wembanyama ya samu maki tara, 9.6 ya sake dawowa kuma ya jagoranci gasar 5.3 toshewa a kowane wasa, yana jagorantar Faransa zuwa lambar azurfa da kuma samun lambar girmamawa a duk gasar. Ya yi gasa a gasar
2021 FIBA Under-19 Kwallon Kwando na Duniya a Latvia. Wembanyama yana da maki 14, 7.4 da kuma 5.7 a kowane wasa, kuma an sanya shi a cikin tawagar 'yan wasa bayan ya jagoranci Faransa zuwa lambar azurfa. Ya yi rikodin maki 22, tara takwas da toshe takwas a cikin asarar 83 zuwa 81 ga Amurka a wasan karshe. Wembanyama ya kafa rikodin FIBA don toshewa a kowane wasa a gasa guda.