Twelve participating teams for the 2019/20 U19 ABA League Championship - Budućnost VOLI, Cedevita Olimpija, Cibona, Crvena zvezda mts, Igokea, Koper Primorska, Krka, Mega Bemax, Mornar, MZT Skopje Aerodrom, Partizan NIS and Zadar - will be divided into two first stage groups.

In Group A in Belgrade, Budućnost VOLI, Cibona, Igokea, Krka, Mega Bemax and Partizan NIS will compete.

In Group B in Zadar, Cedevita Olimpija, Crvena zvezda mts, Koper Primorska, Mornar, MZT Skopje Aerodrom and Zadar are set to participate.

In the first stage, all teams will face each other team within a group in a round-robin system. The two best placed teams of each group will advance to the final tournament.

At the final tournament, the teams will play two games – the semifinal and the final or third place game. The winner of the final tournament will become the champion of the 2019/20 U19 ABA League Championship.