Watch: PGA Tour winner breaks golf rule at U.S. Open final qualifying

PGA Tour winner Adam Svensson made a costly mistake at final qualifying for the U.S. Open. 

The 32-year-old Canadian was attempting to grab one of six spots available at Lambton Golf and Country Club in his homeland. 

After 36 holes, Svensson found himself tied with eight others players on six-under overall. 

That meant the octet headed back out onto the course for a sudden-death contest to determine the three final spots. 

William Mouw and John Parry grabbed the first two, leaving Svensson, Matt Wallace and Max McGreevy to duke it out.

Here's where things got interesting. 

On the third playoff hole, McGreevy secured the final automatic qualifying spot with a birdie, leaving Svensson and Wallace to continue on to determine who would go onto the alternate list at Shinnecock Hills. 

But Svensson made a costly rules blunder, deciding to pick up his marker on the green after McGreevy's putt dropped. Wallace was already in for a par. 

Because Svensson didn't hole out, it meant he forfeited the hole under Rule 3.3c and handed Wallace the first alternate position. 

Golf Channel captured the dramatic moment - view the footage below - and it appeared as though Svensson didn't realise his costly mistake until a rules official stepped in. 

The split-second decision may cost Svensson a place in the U.S. Open completely now. 

Watch what happened here:

Svensson is currently 426th in the Official World Golf Ranking. His sole PGA Tour victory came at the 2022 RSM Classic. 

Overall, his record in the majors has been underwhelming. 

He is yet to play in The Open and he missed the cut on his only appearance at The Masters in 2023. 

He has played two career U.S. Opens, finishing T60 in 2023 and T56 two years ago. 

Svensson will now be the second alternate from that site. 

PGA Tour members Emiliano Grillo, Alejandro Tosti and Marcelo Rozo were the other players to survive the brutal 36-hole qualifier in Canada. 

Several notables also booked their spots in the 2026 U.S. Open field across the nine other sites. 

Billy Horschel, Max Gresyerman and Neal Shipley were among the notable PGA Tour members to advance. 

Max Homa and Tony Finau led the list of high-profile names to miss out. 

The 2026 U.S. Open takes place over 18-21 June.