The 2022 K3 League was the third season of the K3 League as a semi-professional league. Its regular season was held from 26 February to 29 October 2022.
Defending champions Gimpo FC became a professional club and joined the K League. Cheonan City and Cheongju FC are also going to be join the K League in the next year.
The 16 participating teams played each other twice, and the bottom team advanced to the relegation play-off. The K3 League Championship which had been held in play-off format to decide champions before was not held since this year.
Promoted from K4 League
Promoted to K League 2
Relegated to K4 League
The relegation play-off (K4 League promotion play-offs final) was contested between the bottom team of K3 League and the winners of K4 League play-off (semi-final).