Louis Oosthuizen leads the Maybank Malaysian Open by a shot after rain once again meant the event remains behind schedule.
The South African is 13 under through 10 holes of his third round, one clear of Scotland's Stephen Gallacher, who has played 11.
The 2010 Open champion had just made back-to-back birdies around the turn before the hooter sounded with storm clouds once again in the area.
Spaniard Rafael Cabrera-Bello, England's Danny Willett and David Lipsky of the United States share third place, three shots off the pace.
Germany's Martin Kaymer is six back through 12 holes and Charl Schwartzel, the first-round leader, is six under through 13 holes.
"It's a tough week but it was always going to be the case this week,"Oosthuizen said. "None of that will matter if I can win tomorrow.
"My swing feels really good and when you are playing like this you really want to get a win because it just boosts the confidence so much, and it's a good time of year to do that."
Oosthuizen - beaten in a play-off at last week's Masters - had to return early to complete his second round on Saturday after a fierce storm deluged the Kuala Lumpur Golf and Country Club on Friday.
Starting his third round with little prospect of completing it on schedule, Oosthuizen picked up birdies on the par-three fourth and par-five fifth before he dropped his only shot on the next hole.
He had to scramble with a short up-and-down on the par-four seventh after overhitting his pitch shot through the green. He responded by making a 12-foot birdie on the ninth to join Gallacher at the top of the leaderboard, then picked up another shot on the 10th to go clear.
"You never know with the weather here, so you're trying to get ahead of the guys just in case all of a sudden it becomes a 54-hole event," Oosthuizen added.
"I actually don't think that will be the case now, but at that point on the sixth I was still thinking there was a chance this could be the last round."
The latest interruption follows a one-hour delay earlier on Saturday and a wash-out of the final hours of play on Friday.
Play will resume at 7:45am on Sunday (12.45am BST), weather permitting.