The 2021 FIBA 3x3 Europe Cup was the sixth edition of the European 3x3 basketball event that featured separate competitions for men's and women's national teams.

[1] The qualification events took place in 25-26 June in Tel Aviv, Israel and 26-27 June in Constanta, Romania, respectively.

[2] In the men's, host France, 2019 champs Serbia, Russia and Slovenia have qualified based on ranking.

In the women's, host and 2019 champs France, Russia, Netherlands and Romania are automatically through.

In each qualifying tournament, four men's teams and four women's teams earned spots for the final event.