The 2019–20 Junior ABA League was the 3rd season of the Junior ABA League with twelve men's under-19 teams from Serbia, Slovenia, Croatia, Bosnia and Herzegovina, Montenegro and North Macedonia.
On 12 March 2020, the ABA League Assembly temporarily suspended its competitions due to the COVID-19 pandemic.
[1] On 27 May 2020, the ABA League Assembly canceled definitely its competitions due to the COVID-19 pandemic.
Twelve under-19 teams are participating in the 2019–20 Junior ABA League season and they are divided into two groups in the first stage.
[4] Twelve participating teams Budućnost VOLI, Cedevita Olimpija, Cibona, Crvena zvezda mts, Igokea, Koper Primorska, Krka, Mega Bemax, Mornar, MZT Skopje Aerodrom, Partizan NIS and Zadar were divided into two first stage groups.