The moment could come in the final round of the HSBC Champions today. Rain washed out play Friday, delaying the third round -- and a few holes of the fourth -- until Sunday.
Wilson, of England, shot 3-under-par 69 for a three-round total of 12-under 204. He parred the first two holes of the fourth round before play was halted by darkness.
Wilson, 55th in the Official World Golf Ranking, must move into the top 50 to earn an invitation to the 2009 Masters Tournament.
Australia's Geoff Ogilvy and American Phil Mickelson shot 70s in the third round, leaving Ogilvy a stroke back and Mickelson two behind in his title defense. Sergio Garcia (10-under) and Henrik Stenson (9-under) had 72s.
"Anytime you're in the lead, it's got to be the best place to be," said Wilson.
"It (the Ryder Cup) has proved to me and everyone else that I can do it when it matters," added Wilson, who has four runner-up finishes on the European Tour, but has yet to win.
After three days of wet conditions, Sunday was dry, cool and windy at the Sheshan Golf Club on the outskirts of Shanghai.
"It was tough today," Wilson said. "Definitely the toughest day we've had so far."
Anthony Kim was disqualified for playing with an altered driver after accidentally hitting it on a sprinkler head.
LPGA TOUR: In Shima, Japan, Ji-yai Shin won the Mizuno Classic for her second LPGA Tour title, shooting 5-under-par 67 to hold off Mayu Hattori, of Japan, at Kinetsu Kashikojima.
NATIONWIDE TOUR: In McKinney, Texas, Bryce Molder closed in on a PGA Tour card, shooting 7-under-par 64 for a share of the third-round lead with Matt Bettencourt in the season-ending Nationwide Tour Championship.
Molder, a Georgia Tech alum who is 32nd on the money list, needs to finish in the top 25 in earnings to earn a 2009 PGA Tour card.