Mezue ahịrịokwu na-esonụ: N'afọ 2016, Curbelo meriri nrite ọla edo na Puerto Rico na Centrobasket Under-15 Championship na Patillas, Puerto Rico mgbe ọ gbasịrị akara 16.5, asaa rebounds na 6.5 na-enyere aka kwa egwuregwu. Na 2017 FIBA Under-16 Americas Championship na Formosa, Argentina, o nwetara akara 21.8 nke na-eduga asọmpi, 7 rebounds, 3.2 enyere aka na 3.5 na-ezu ohi kwa egwuregwu ma merie ọla nchara. Curbelo gbara asọmpi na 2018 FIBA Under-17 World Cup na Argentina, ebe ọ na-agbatị 13.6 isi, 5.6 rebounds na asọmpi-elu 5.9 na-enyere aka kwa egwuregwu ma duru ndị otu ya na ọla nchara ọzọ. O nwetara ihe ruru 11.1 na 5.6 na-enye aka n'otu egwuregwu na
2019 FIBA Under-19 World Cup na Heraklion, Gris dịka Puerto Rico kwụsịrị n'ọnọdụ nke isii.