In April 2016, Lee passed the Olympic Test Events and qualified for the 2016 Rio Olympic games. He was the first gymnast to qualify the Olympics since the 2000 Sydney Olympic games. Lee was diagnosed with a broken right shinbone and a sprained right ankle one month before the Olympic game. Lee lost the chance to move to the finals because these injuries affected his performance. After the failure in the Olympic game, Lee started training overseas. In addition, his coach helped him adapt to stressful environments by imitating the crowds and noisy environment when he was practicing.