On July 28, Lee competed at the 2018 U.S. Classic where she finished fifth in the all-around. She won the gold medal on balance beam despite not doing a dismount. Lee competed in August at the 2018 U.S. National Championships in Boston as one of the favorites for the junior national title along with Leanne Wong, Jordan Bowers, and Kayla DiCello. She won the bronze medal in the all-around behind Wong and DiCello and won the gold medal on the uneven bars.