Emery, who played in two seasons with the Blackhawks and won the 2013 Stanley Cup with the team, was just 35 years old.
"The Blackhawks organization was deeply saddened to hear of Ray Emery's passing," the team said in a statement. "We extend our heartfelt condolences to his family and friends. The Blackhawks will fondly remember Ray as a fierce competitor, a good teammate and a Stanley Cup champion."
According to authorities in Hamilton, Canada, police recovered Emery’s body just before 3 p.m. Sunday afternoon. Emery was reported missing just after 6 a.m. in the harbor, and his body was recovered near where he was last seen, police said.
The cause of death is still under investigation.
In 287 career NHL games, Emery registered a 145-86-28 record and a .906 save percentage. He was a member of the 2010 Philadelphia Flyers squad that fell to the Blackhawks in the Stanley Cup Final, and was on the Hawks team that beat Boston in the 2013 Final.