2020–21 Junior ABA League

The 2020–21 Junior ABA League was the fourth season of the Junior ABA League with eight men's under-19 teams from Bosnia and Herzegovina, Montenegro, and Serbia. Teams are the under-19 selections of the ABA League teams. The season will a single-elimination tournament held in Čajetina, Serbia from 21–24 May 2021.

Mega Soccerbet U19 won its second Junior ABA League title defeating Budućnost VOLI U19 in the final. Guard Nikola Jović was named the Junior ABA League MVP award.

Teams
A total of 8 teams contested the league, excluding representatives from Croatia, North Macedonia, and Slovenia.

Venue
The tournament will be held in Čajetina, Serbia.

Quarterfinals
All times are local UTC+1.