Buuxi weedha soo socota: Barnes wuxuu ku guuleystay billad dahab ah Mareykanka 2017 FIBA Under-16 Americas Championship ee Formosa, Argentina kadib celcelis ahaan 9.8 dhibcood, 3.2 rebounds iyo 2.4 xaday ciyaar kasta. Guushii semi finalka ee Argentina, wuxuu hogaamiyay dhamaan goolhayaha oo leh 20 dhibcood iyo lix xaday isagoo jabiyay rikoodhka Mareykanka ee ka yar 16 sano ee boqolkiiba tuurista bilaashka ah isagoo toogtay 8 ka mid ah 8 khadka tuurka bilaashka ah. Koobkii Adduunka ee FIBA Under-17 ee 2018 ee Argentina, Barnes wuxuu celcelis ahaan helay 9.5 dhibcood iyo 5.8 rebounds ciyaar kasta wuxuuna ku guuleystay billad dahab ah. Waxa uu celcelis ahaan 9.7 dhibcood, 4.9 rebounds iyo 2.7 caawiyaan halkii kulan ee
2019 FIBA Under-19 World Cup ee Heraklion, Greece, halkaas oo uu ku guuleystay billaddii dahabka ahayd ee saddexaad ee Mareykanka.