Sunseok Seo (Seoul, KOR) run at the 2021 Korean Curling Wheelchair Championship came to an end in the semifinals with a 5-4 loss to Jaehyeok Jang (Uijeongbu, KOR). of the 2021 Korean Curling Wheelchair Championship in Gangneung, Korea;
 
Seo finished 0-3 in the 0-team qualifying round. . In their opening game, Seo lost 6-5 to Jang, droppimg another game, 9-6 to Jinho Cha (Jeonnam, KOR). Seo lost 11-10 to Byeongil Noh (Gyeongbuk, KOR) in their final qualifying round match.
 
Seo ranks th overall on the Year-to-Date rankings with points earned so far this season.