Devillard began her season with a bronze medal on vault at the Doha World Cup. At the National Championships, she placed sixth in the all-around and won silver on vault despite falling on both vaults. At the Sainté Gym Cup, Devillard won gold medals with the team and on vault, and she won a bronze medal on floor. Devillard was selected to compete with Juliette Bossu, Marine Boyer, Lorette Charpy, and Melanie de Jesus dos Santos at the 2018 European Championships, and the team won a silver medal. Individually, Devillard finished sixth on vault. Devillard could not go to the World Championships because of an ankle injury.