2019 K3 League Advanced

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).

Icheon Citizen abandoned the last three matches of the regular season to avoid the spread of African swine fever virus, which could damage pig farms in Icheon.

Relegation playoff
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.

Championship playoffs
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.

Final
Hwaseong FC won 2–0 on aggregate.