The Golden Knights lead the series 2-1. However, San Jose's euphoria quickly turned to incredulity when the goal was not only waved off for interference but San Jose was penalized as well, putting Vegas on the power play. Marc-Andre Fleury registered 34 saves on 37 shots in the winning effort.
San Jose and Vegas last season split the first two games of the series 1-1 in Vegas during the Second Round.
Stone, who had five goals in 18 regular-season games with Vegas after coming over in a trade-deadline deal with Ottawa, sealed the win his third goal of the night and sixth in three playoff games when he beat Jones with another backhand at the end of a give-and-go with Stastny.
After getting outplayed in Game 1, the defending Western Conference champs have used their physicality to dominate the last two games, outhitting the Sharks 46-31 in Game 2 and 56-42 in Game 3. In last year's Game 3, Vegas bested San Jose in a 4-3 overtime victory at SAP Center.
Stone got to work right from the first puck drop, netting a wide-open goal 16 seconds into the first period for his fourth of the series.
For the third straight period the Golden Knights jumped out scoring:36 second into the final period.
Couture got his second of the series when his pass intended for Joe Pavelski was tipped in by Vegas defenseman Brayden McNabb. San Jose would tack one on late in the period to cut the lead in half 2-1.
"I don't think we had enough participants playing at a high enough level", he said, before adding: "One thing about our group is that they don't quit". That's something we can hang our hat on.
First, Stastny grabbed a rebound between the circles, skated to his left and drove a wrist shot past Jones 21 seconds into the period. During the KHL playoffs, he recorded 19 points, which ranked second in the league.
Game 3 between the teams moved to T-Mobile Arena in Las Vegas, which is the home of the Golden Knights.