2019–20 ABA League Second Division
The 2019–20 ABA League Second Division was the 3rd season of the ABA Second Division with 12 teams from Bosnia and Herzegovina, Croatia, Montenegro, North Macedonia, Serbia, and Slovenia participating in it.
On 12 March 2020, the ABA League Assembly temporarily suspended its competitions due to the COVID-19 pandemic. On 27 May 2020, the ABA League Assembly canceled definitely its competitions due to the COVID-19 pandemic. The ABA League Assembly decided not to recognize any team as the champion for the season, and decided to award the two wild cards for the 2020–21 ABA First League season to Borac Čačak and Split.
Teams
Team allocation
The labels in the parentheses show how each team qualified for the place of its starting round:- 1st, 2nd, etc.: National League position after Playoffs
- WC: Wild card
Venues and locations
| Team | Home city | Arena | Capacity |
| Borac | Čačak | Borac Hall | |
| Dynamic VIP PAY | Belgrade | Ranko Žeravica Sports Hall | |
| Helios Suns | Domžale | Komunalni center Hall | |
| Lovćen 1947 Bemax | Cetinje | Lovćen SC | |
| MZT Skopje Aerodrom | Skopje | Jane Sandanski | |
| Novi Pazar | Novi Pazar | Pendik Sports Hall | |
| Rogaška | Rogaška Slatina | Rogaška Slatina SH | |
| Sloboda | Tuzla | SKPC Mejdan | |
| Spars Realway | Sarajevo | Grbavica Sports Hall | |
| Split | Split | Arena Gripe | |
| Sutjeska | Nikšić | Nikšić SC | |
| Široki | Široki Brijeg | Pecara |