The 2019 K3 League Advanced was the 13th and last season of amateur K3 League. After the end of the 2019 season, the K3 League was relaunched as a semi-professional league by Korea Football Association (KFA).[3]
The promotion-relegation playoff was contested between winners of Basic league playoff and 10th-placed team of Advanced league, but the match became meaningless after Korea Football Association decided to examine every K3 League club for qualification for newly-founded K3 League or K4 League.[5]
When the first round and semi-final matches were finished as draws, their winners were decided on the regular season rankings without extra time and the penalty shoot-out.[6]