Dunne turned senior in 2018. Although the United States did not send a team, Dunne represented her club at the 2018 City of Jesolo Trophy. She finished 15th in the all-around. She competed at the 2018 U.S. Classic only on uneven bars due to an ankle injury. Dunne qualified to compete at the National Championships via petition. She ended up placing 18th in the all-around.