The cream has risen to the top at the ISPS HANDA PerthInternational with Louis Oosthuizen taking a three shot lead into the finalround.

Louis OosthuizenLooking unstoppable at Lake Karrinyup Country Club, Oosthuizen was 7-under the card through 15 holes and had stretched his lead out to five shots.

However back-to-back bogeys saw him come back to the field, setting up the final round for a dramatic finish.

"That pin position on 17, I felt was tough today. You needed to hit that green.  Pitching it from anywhere was really difficult," said Oosthuizen.

"And the one on 16, my second shot probably should have favoured the pin more than fat side of the green to take the pin on and leave myself on the right of it."

"Those things happen.  As long as it's not happening when you're tied with the lead three holes to go, but luckily there's still a lot of holes left."

Backing himself in the final round Oosthuizen knows he will need another good performance tomorrow if he is to claim the title.

"I think anyone will expect to win, but there's a lot of golf to be played," added Oosthuizen. 

"You still need to hit the shots.  Around this golf course especially, someone can go out and be 3 or 4‑under in the first five holes and it changes everything."

"So I need to play good golf tomorrow, solid golf, give myself a lot of birdie opportunities like I did today, and there's not much more that you can do then."

With a round of 7-under 65, Frenchman Romain Wattel is tied second with overnight leader Peter Uihlein who was only able to go one shot better to be 12-under the card.

West Australian Jason Scrivener is the leading Australian after three rounds and is 11-under the card after consistent performances of 69, 67, 69.

Flying under the radar Scrivener is happy to be in contention at home for his first European Tour title.

"Everyone else can kind of do the work, they've all won before, done it before, I'm very happy to go under the radar and maybe if I can shoot a low one tomorrow and come up from behind," he said.

"I feel like I haven't played my best golf yet, I've played some solid golf at times but haven't really played my A-game yet. So if I can really fire at a few flags and hit a lot of good shots I think I can shoot a low one out there tomorrow," Scrivener added.

Having a tough day on course was Brett Rumford but he managed to produce one of the shots of the tournament; a hole out from the bunker on the par-4 14th. He followed that up with another eagle on the 15th.

However those heroics were not enough to salvage his round and he finished the day on 1-over 73 to be 10-under the card after three days.

"It's just random, the game, isn't it," said Rumford.

"There's not much I can actually say.  I'm not going to try to analyse it too much, because I'll do the exact same things tomorrow, and who knows, maybe I'll be on the other side of the coin making birdies and contesting for the tournament." 

A shot further back and rounding out the top-10 are Marcus Fraser (AUS), Mikko Korhonen (FIN), Richard Lee (CAN), Mardan Mamat (SIN) and Alexander Levy (FRA).

The final round of the ISPS HANDA Perth International tees off tomorrow at 7am with the lead group of Louis Oosthuizen and Romain Wattel out at 12.45pm.