the offseason, he returned to his home province Quebec. After three full seasons in Buffalo, Deslauriers was assigned to their AHL affiliate, the Rochester Americans, before the 2017–18 season. Montreal Canadiens On October 4, 2017, the opening day of the NHL season, Deslauriers was traded by the Sabres to the Montreal Canadiens in exchange for Zach Redmond. Upon joining the team, he was reassigned to the Laval Rocket where he tallied three goals and five points in 14 games. On November 15, 2017, he was recalled to the NHL level and made his debut with the Canadiens in a game against the Arizona Coyotes. He remained with the team through December where he led the team with four goals through 11 games. He also led all NHL players with 54 hits, and ranked first on the team and tied for seventh in the league in goal differentials. In honour of his improved playing skills in December, Deslauriers earned the Molson Cup honour at the end of December 2017. Following this, he was promoted to play on the Canadiens' top line with Jonathan Drouin and Alex Galchenyuk. After playing in 36 games with the Canadiens, Deslauriers signed a two-year, one-way contract extension worth $1.9 million. Upon finishing the previous season with numerous career-highs, Deslauriers rejoined the Canadiens for their 2018–19 campaign. During a preseason matchup against the New Jersey Devils on September 17, 2018, Deslauriers suffered a facial fracture and was placed on the injured reserve. He returned to the lineup for Montreal's game against the Ottawa Senators on October 20, 2018. On November 8, 2018, Deslauriers scored his first points of the 2018–19 season. Against his former team, the Buffalo Sabres, he assisted a goal by Matthew Peca and scored a shorthanded goal of his own. Deslauriers was unable to replicate his previous season offensive totals, contributing with just two goals and five points through 48 games. Anaheim Ducks On June 30, 2019, Deslauriers was traded by the Canadiens to the Anaheim Ducks in exchange for a 2020 fourth-round draft pick. Upon joining the team for the 2019–20 season, Deslauriers tallied seven points and 80 penalty minutes through 45 games by February. As such, he signed a two-year contract to remain with the Anaheim Ducks organization. Following the contract signing, Deslauriers set the record for fastest hat trick in Ducks history after scoring all three goals in the first period.