KIAWAH ISLAND, S.C. — By the time a thunderstorm rolled through The Ocean Course on Saturday, putting a premature end to third-round action in the PGA Championship, it might already have been too late for Tiger Woods.

While Rory McIlroy had moved into a share of the lead with Vijay Singh and Adam Scott was a stroke behind them, Woods had played his way down the leaderboard on a rain-interrupted day that might have doomed his chance of collecting his 15th major-tournament victory.

The third round is scheduled to resume at 4:45 a.m. PDT Sunday, and the final round is scheduled to start about four hours later.

Play will resume with McIlroy and Singh tied at 6-under par midway through their third rounds. McIlroy will be on the 10th hole and Singh is playing the par-3 eighth. Scott will be on the 10th hole at 5 under and Carl Pettersson is 4 under playing the ninth hole.

There are intriguing issues Sunday:

• Can Singh, with renewed confidence at age 49, win his third PGA Championship and fourth major title?

• Is this the day McIlroy, a disappointment in previous major championships this season when so much was expected, buries the questions and provides an emphatic answer?

• Will Scott, three weeks removed from British Open heartbreak caused by closing with four bogeys in a row, rebound?

• And can Woods, who has not won a major from behind entering the final round, summon the magic that went missing Saturday and capture his first Grand Slam event in more than four years?

McIlroy was in the midst of the day's biggest move, making five birdies in his first eight holes, only to give a stroke back with a bogey at the ninth shortly before play was stopped. He posted a 4-under 32 on the front side.

"It was the start I was looking to get off to," said McIlroy, who hasn't shot lower than 73 on the weekend in a major this year.

"The way I'm looking at it, I'm going into the final day of the final major of the season tied for the lead. I can't ask for much more. I don't care if it's going to be 27 holes, 18 holes, 36 holes. I'm just happy going in there in a good position."

Singh rifled an iron onto the first green to set up an opening birdie while Woods, his playing partner, struggled.

Woods started the day tied for the lead and dropped into a tie for 11th place at 1 under. He played seven holes Saturday in 3 over. In six full rounds after the halfway mark at this year's majors, Woods has yet to break par.

When he pulled a 5-foot birdie putt at the par-4 third hole, Woods' frustration flashed. He lingered before holing his par putt, seeming to brood over the missed opportunity.

Trying to hold his tee shot into a right-to-left wind on the par-4 fourth, Woods lost his drive to the left, finding a bad lie in the rough. He muscled his approach shot long and left, bouncing it off a spectator's foot and into another bad lie, leading to a bogey, one of nine made by the 72 players at the hole Saturday.

At the par-3 fifth, Woods missed the green left and made a second consecutive bogey. Woods made another bogey at the par-5 seventh.

"I got off to a rough start (Saturday) and couldn't get anything going," Woods said through a spokesman.

"I'll come back (Sunday) morning and see what happens. There are a lot of holes left to play."

Other tournament

• Four players from South Korea share the lead in the LPGA Jamie Farr Toledo Classic in Sylvania, Ohio.

I.K. Kim and Jiyai Shin shot 5-under 66s and were at 11 under for 54 holes, along with So Yeon Ryu (67) and Hee Kyung Seo (68).

Mika Miyazato (69) of Japan and South Koreans Inbee Park (69) and Chella Choi (70) were at 10 under.

Jimin Kang (71), a graduate of King's High School in Shoreline, was tied for 43rd place at 1 under. Wendy Ward (74), who lives near Edwall, outside Spokane, was tied for 62nd at 1 over.