Tiger Woods held a two-shot lead after the second round but never got out on to the Torrey Pines course as only half a dozen players started their third rounds.
Former Ryder Cup player Hunter Mahan had time to par the 10th hole, as did playing partners Robert Garrigus and John Mallinger.
Boo Weekley was in the rough to the right of the first fairway after his tee shot, with Mike Weir and Chez Reavie in the short grass to his left, but that was the extent of the day's play.
Former world number one Woods will resume on Sunday on 11 under par, with Billy Horschel his nearest challenger on nine under.
There are six players a further shot behind while the seven-strong group at seven under includes England's Ross Fisher, Korean Charlie Wi, Nick Watney and Tag Ridings, who hit a hole in one in the first round.
Play will resume at 10am ET (3pm GMT) and continue as long as there is daylight, with tournament organisers expecting to have to return on Monday to complete between nine and 12 holes. The 87 players who made the cut will play in the same threesomes for both remaining rounds.
Defending champion Brandt Snedeker, who shared the lead after an opening 65 but fell to four under yesterday, reflected on a frustrating day.
"We have these days from time to time," he told pgatour.com. "You realize it's a different week, and could be a Monday finish now and be ready for that.
"You catch up with some guys you haven't seen in a while, you do a lot of storytelling.
"Tomorrow [Sunday] you'll have to go low. It's going to be a weird day. You'll play a lot of golf tomorrow, and probably play more than 18 holes.
"We need to get out here with the mindset that we need to make a lot of birdies, try to get back in contention and do as well as you can."
The aborted day's play had been designated "University Day", with players urged to wear their school colours and with the opportunity to win cash prizes for their university.