FINAL ROUND LEADERBOARD:
(US unless stated)
-7 R Barnes (after 1 hole), L Glover (after 1)-2 P Mickelson (2), H Mahan (2), R Fisher (Eng, 1), D Duval (2) -1 M Weir (Can, 3) Level T Woods (7) , S Hansen (Den, 5), G McDowell (NI, 4), B Watson (4), R Goosen (SA, 3))
Selected others: +2 O Wilson (Eng, 5), R McIlory (NI, 10) +3 S Garcia (Spa, 7) +5 L Westwood (Eng, 8), I Poulter (Eng, 5)
Barnes saw his lead disappear early in the final round at Bethpage
Ricky Barnes and Lucas Glover will resume with a five-shot lead when the final round of the 109th US Open concludes at Bethpage on Monday.
The unheralded Americans are seven under and clear of Phil Mickelson, former world number one David Duval, England's Ross Fisher and Hunter Mahan.
Defending champion Tiger Woods picked up a late birdie to close to within seven as play ended at about 0110 BST.
Monday's final round will resume at 0900 local time (1400 BST).
The Monday finish, caused by torrential rain and waterlogging on Thursday and Saturday evening halting play, will be the first time a US Open has overrun since Larry Nelson won at Oakmont in 1983.
Should players be level at the end of 72 holes, an 18-hole play-off will begin immediately after, weather permitting.
The 28-year-old Barnes, who won the 2002 US Amateur, led Glover by one at halfway, but despite forging as much as six shots clear in the third round, he ended with a level-par 70 to remain one clear of his compatriot going straight into the fourth round on Sunday.
But PGA Tour rookie Barnes, ranked 519 in the world, dropped a shot at the opening hole to rejoin one-time PGA Tour winner Glover overnight as some of golf's biggest names massed behind.
The popular world number two Mickelson, roared on by the vocal New York crowd who sympathise with the plight of his wife Amy who has breast cancer, leads the pack at two under after parring the first two holes of his final round.
The 39-year-old left-hander, who was second behind Woods at the Bethpage in 2002, is a three-time major winner but is eyeing his first US Open title after four runner-up finishes.
"If I can get a hot round going I can make up the difference. I'm one good round away," Mickelson said after his third round.
Also on two under are rising Surrey star Fisher and America's 2001 Open champion Duval, who both dropped a shot at the 1st, and US Ryder Cup player Mahan.
Canada's 2003 Masters champion Mike Weir is alone in seventh at one under, while Woods nudged into the group at level par with a birdie on the 7th after the hooter sounded in the gloom of Sunday evening.
The world number one will have to equal both the US Open 36-hole comeback record of 11 strokes, set by Lou Graham in 1975, and the record of nine shots that Arnold Palmer clawed back in the final round when he won at Cherry Hills in 1960, if he is to clinch a 15 major title.
He will also have to achieve a first by winning his first major when not leading or sharing the lead after 54 holes.
"I'm going to have to shoot a low round and probably get some help," said Woods before the final round.