(CNN) -- Charl Schwartzel, Andrew McLardy and David Drysdale share the lead going into the final round of the Joburg Open after the trio finished a rain-affected third day on 11-under-par.
Overnight leader Drysdale continues to hold a share of the Joburg Open advantage after 54 holes.
A second consecutive day of lightning and rain meant that three hours were lost in two separate interruptions at the Royal Johannesburg and Kensington Golf Club, but it did not stop South African Schwartzel from producing a sizzling eight-under-par 63.
His countryman McLardy and Scotsman Drysdale, who led at the halfway stage, were less impressive, though, with both picking up birdies at the last for rounds of 69 and 71 respectively, to ensure a share of the lead.
Retief Goosen, Joakim Haeggman and Anders Hansen lead the chasing pack at 10-under, with no fewer than seven players a further stroke back, including Britons Danny Willet and Michael Hoey, who both had poor rounds of 71 and 72 to slip down the leaderboard.
But it was Schwartzel who made the biggest move of the day in an eventful round that included an astonishing 10 birdies, a hole-in-one, two bogeys and also a double bogey as he ripped through the east course on Saturday.
He picked up seven shots through his opening 10 holes, before a double bogey on the par-four 11th was followed by a sublime seven iron on next hole -- the par-three 205-yard 12th -- that dropped 10 centimeters from the cup and rolled in.
The world number 68 told PA Sport: "What a day! The first 10 holes, I felt pretty flawless. Nothing could go wrong, I was hitting the ball close, I wasn't making any long putts, I was just hitting it four-foot from the hole every time."
Two-time major winner Goosen was faultless through his third round, firing a six-under round of 65 at the co-sanctioned European and Sunshine Tour event and was especially impressive at the turn where he picked up four birdies in six holes between eight and 13.
Defending champion Richard Sterne managed two birdies in his last two holes to move to six-under and keep his hopes of winning a third consecutive European Tour title alive.