While the 27-year-old will explore his options for a deal elsewhere, he's not closing the door on the Sharks, LeBrun added.
Donskoi enjoyed a productive rookie campaign in 2015-16, producing 11 goals and 36 points, but hasn't shown much growth since. The Finnish winger recorded 37 points in 80 games this past season while logging a career-low 13:25 of ice time per game.
The Sharks have a long list of forwards in need of new contracts, including restricted free agents Timo Meier and Kevin Labanc. Captain Joe Pavelski and veteran Joe Thornton are also set to become unrestricted free agents. Under the estimated $83-million salary cap, the club has a projected $15.34 million to work with.