Mezue ahịrịokwu na-esonụ: Jokubaitis na-egwu 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 na Egypt, na-agbakọta ihe 10 na 5.3 na-enyere aka kwa 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 ruo ebe nke anọ na
2019 FIBA Under-19 World Cup na Gris, ebe o mere ihe ruru 11.3 na 5.6 na-enyere aka kwa egwuregwu.