Pari gbolohun yii: Ni ọdun 2016, Curbelo gba ami ẹyẹ goolu pẹlu Puerto Rico ni Centrobasket Under-15 Championship ni Patillas, Puerto Rico lẹhin ti o ṣe apapọ awọn aaye 16,5, awọn rebounds meje ati awọn iranlọwọ 6.5 fun ere kan. Ni 2017 FIBA Under-16 Americas Championship ni Formosa, Argentina, o ṣe apapọ awọn aaye 21,8 ti o jẹ oludari idije, awọn rebounds 7, awọn iranlọwọ 3.2 ati awọn ji 3.5 fun ere kan o si gba ami ẹyẹ idẹ kan. Curbelo kopa ninu 2018 FIBA Under-17 World Cup ni Argentina, nibi ti o ti ṣe apapọ 13.6 awọn ojuami, 5.6 rebounds ati idije-giga 5.9 ṣe iranlọwọ fun ere kan ati mu ẹgbẹ rẹ lọ si ami idẹ miiran. O ṣe apapọ 11.1 ojuami ati 5.6 ṣe iranlọwọ fun ere ni
2019 FIBA Under-19 World Cup ni Heraklion, Greece bi Puerto Rico ṣe pari ni ipo kẹfa.