Sam Burns was two strokes clear at the top of the leaderboard when the Genesis Invitational third round was suspended due to darkness on Saturday.
Overnight leader Burns completed 13 holes before fading light brought a premature end to the penultimate round at Riviera Country Club in California, where 24 players did not finish their rounds following inclement weather earlier in the day.
The third round will resume at 06:45 (local time) in Pacific Palisades on Sunday.
American golfer Burns carried a five-shot lead into the third round of the PGA Tour tournament.
That advantage reduced to just two strokes after going two over through 13 holes, to be 10 under overall at the time of the suspension.
England's Matthew Fitzpatrick (through 17) is the nearest challenger, while world number one Dustin Johnson (through 13), Wyndham Clark (through 15) and Max Homa (through 13) are lurking at seven under.
Jordan Spieth – seeking his first title since the 2017 Open Championship, is through 15 and four under as the three-time major winner and former world number one prepares to return early on Sunday morning.
Spanish star Jon Rahm managed to complete his round, carding a one-over-par 72 to be two under through 54 holes, alongside the likes of Xander Schauffele (71).
Four-time major champion Brooks Koepka is two over following his forgettable third-round 77, while defending champion Adam Scott (through 15) is struggling at four over.