Kiawah Island, South Carolina - Rory McIlroy's climb up the leaderboard was cut short on Saturday after play in the third round of the 94th PGA Championship was suspended because of thunderstorms.
McIlroy had an entertaining third-round charge at the season's final major championship as he opened his round with two consecutive birdies then had his tee shot on No 3 get stuck in a tree on the soggy Kiawah Island Ocean Course.
McIlroy, the 2011 US Open champ, was four under through nine holes on the day and tied for the lead with Vijay Singh at six-under overall when the horn sounded in the late afternoon to call the players off the course.
"It was a great start, the start I was looking to get off to," McIlroy said. "I saw that a few guys early in the day got off to good starts and I wanted to do that to."
Former two-time PGA champion Singh was two-under through seven holes in his round while playing alongside world number two Tiger Woods.
After one of the toughest rounds in PGA Championship history on Friday, Mother Nature bared her teeth again on Saturday as the storm clouds that had threatened all day finally arrived.
Organisers suspended play at 18:30 (23:30 GMT) with the remainder of the third round scheduled to resume at 07:45 on Sunday. Once the third round is complete, the final round will go off in groups of three beginning at 11:44.
PGA of America spokesperson Kerry Haigh said he doesn't think there will be a problem getting all the rounds completed by Sunday evening.
"Unfortunately, the weather gods turned against us today," said Haigh. "We had lightning very close by and obviously some heavy rain. But the forecast for tomorrow is very positive."
Australia's Adam Scott was alone in third at five under overall after playing nine holes Saturday while second round co-leader Carl Pettersson of Sweden was in fourth at four-under overall.
Woods, who shared the second-round lead with Pettersson, tumbled down the leaderboard Saturday as he had three bogeys through his first seven holes and was one under on the tournament, five strokes back of McIlroy and Singh.
Fiji's Singh, who turns 50 in February, is trying to become the oldest player to win a major golf championship.
American Bo Van Pelt was the clubhouse leader at three-under after a five-under 67 on Saturday.
McIlroy birdied the par-four first and par-five second holes before going on an adventure on the 390-yard, par-four third hole. The 23-year-old Northern Irishman hit his drive high in the air and when it came down it got stuck in a dead branch of a Cypress tree.
McIlroy spent a several minutes looking for it on the ground and was just about to climb the tree when someone spotted it and alerted him.
He had to take an unplayable lie and hit his next shot to 10 feet and made par.
"I was sure it's just somewhere around here in these long grass things or in the wood chip or whatever," he said. "We'd been looking for it for about three minutes and then one of the guys that was working for the TV came over and said, 'you know, it's actually stuck in the tree.'
"I'm like, how can it be stuck in this thing? There's no branches, no leaves for it to be stuck in. But it had wedged itself in between the tree bark and the actual tree, so I was just happy to get it up-and-down for four," he added.
"I think that's the first time a ball has ever got stuck up a tree on me. Hopefully it doesn't happen again."
McIlroy retrieved the ball out of the cup and flung it into the alligator pond behind the fourth tee box.
Second round co-leader Woods was in Saturday's marquee group with Singh. Between the two of them, they have six PGA Championship titles.
Woods began his day with three pars but then made bogey on three of the next four holes.
"I got off to a rough start today and couldn't get anything going," said Woods. "I'll come back tomorrow morning and see what happens. There are a lot of holes left to play."
Partial scores on Saturday in the suspended third round of the PGA Championship at par-72 Kiawah Island Resort (Ocean Course) on Kiawah Island, South Carolina. A total of 26 players will complete their third round on Sunday (USA unless stated, all times Local):
213 - Bo Van Pelt 73-73-67
214 - Steve Stricker 74-73-67
215 - Jimmy Walker 73-75-67, David Lynn (ENG) 73-74-68, Padraig Harrington (IRL) 70-76-69
216 - Geoff Ogilvy (AUS) 68-78-70
217 - Bill Haas 75-73-69, Marc Leishman (AUS) 74-72-71
218 - Justin Rose (ENG) 69-79-70, Jason Dufner 74-76-68, Bubba Watson 73-75-70, Greg Chalmers (AUS) 70-76-72
219 - Paul Lawrie (SCO) 73-75-71, Louis Oosthuizen (RSA) 70-79-70, Jim Furyk 72-77-70, J.J. Henry 72-77-70, John Senden (AUS) 73-74-72, Ben Curtis 69-77-73
220 - Thorbjorn Olesen (DEN) 75-74-71, Rich Beem 72-76-72, Alex Noren (SWE) 67-80-73, Ernie Els (RSA) 72-75-73
221- Sang Moon Bae (KOR) 72-78-71, Darren Clarke (NIR) 73-76-72, Brendon de Jonge (ZIM) 71-78-72, Robert Garrigus 74-73-74, Y.E. Yang (KOR) 73-74-74, Charl Schwartzel (RSA) 70-77-74, Gary Woodland 67-79-75, KJ Choi (KOR) 69-77-75
222 - David Toms 72-78-72, Dustin Johnson 71-79-72, Matt Every 72-76-74
223 - Seung-Yul Noh (KOR) 74-75-74, Chez Reavie 74-76-73, Thomas Bjorn (DEN) 70-79-74, Retief Goosen (RSA) 73-75-75, Ken Duke 71-78-74
224 - Luke Donald (ENG) 74-76-74, Cameron Tringale 69-78-77, Ryo Ishikawa (JPN) 69-77-79, Scott Piercy 68-78-78
226 - Toru Taniguchi (JPN) 72-76-78
227 - Marcus Fraser (AUS) 74-75-78, George McNeill 71-76-80
229 - John Huh 72-78-79