Dee ihe na-aga n'ihu na paragraf a - Jokubaitis gbara bọọlụ maka Lithuania na 2016 FIBA U16 European Championship na Poland. O nwetara akara iri ma nyere ndị otu ya aka inweta ọlaọcha. Jokubaitis bụ onye kachasị na-eto eto na 2017 FIBA Under-19 World Cup
n'Ijipt, nkezi ihe 10 na 5.3 na-enyere aka n'otu egwuregwu maka otu egwuregwu nke isii. Na 2018 FIBA U18 European Championship na Latvia, o nwetara akara 12.9 na 5.6 rebounds kwa egwuregwu ka ndị otu ya kwụsịrị nke ise. Jokubaitis duziri Lithuania gaa n'ọnọdụ nke anọ na 2019 FIBA Under-19 World Cup na Gris, ebe ọ na-eme nkezi 11.3 isi na 5.6 na-enyere aka kwa egwuregwu.