The Shenzhen International will go into a fifth day after more thunderstorms delayed the final round at Genzon Golf Club.
With over six and a half hours lost over days one and two, all three completed rounds had run into an extra day and, when more electrical activity caused a further delay on Sunday afternoon, it was clear it would not be possible to get the final round completed.
Lee Slattery had turned in 34 to open up a one-shot lead just before the hooter sounded at 2.29pm, with the final group of Soomin Lee, Alexander Levy and Callum Shinkwin on the ninth fairway behind him.
Play was set to resume at 5.20pm, but the players would have to return at 6.30am on Monday to determine who would win the second edition of the event in Guangdong.
Slattery had returned to the course at 6.30am to finish his third round and recorded two birdies to finish three shots behind 54-hole leader Lee.
Lee had been five ahead as he stood on the 17th tee in his own third round but a double-bogey followed by three dropped shots in his first eight holes of round four saw him fall behind.
Levy had made three birdies in the morning as he finished up round three, and had two birdies in his opening eight holes to sit just a single shot behind Slattery at 13 under.
Brandon Stone, without a bogey since his third hole in round one, turned in 34 to sit alongside Lee a further shot back, one clear of Bradley Dredge, Scott Hend and Joost Luiten.
Levy made the early move in round four with an approach to a foot producing a birdie on the first as Lee dropped a shot, but the Frenchman gave the gain straight back on the next with play delayed by a short downpour.
Dredge had moved into the group at 12 under courtesy of a brilliant approach to the first and when he got it close again on the fourth, he was just a shot off the lead.
Slattery made a smart par save on the fifth and then birdied from 15 feet on the sixth to also get within one, and he was soon joined by Levy who went right at the pin for a birdie on the fifth.
Another huge downpour came with the final group on the sixth and ahead at the seventh Dredge found bunker trouble and ended up recording a triple-bogey.
Lee also fell victim to the seventh when he lost his ball off the tee to record a double and he fell out of the lead for the first time since round one.
Slattery then had time to take advantage of the par five ninth to move into the lead on his own at 14 under before the horn sounded.
Stone had a birdie on the third and then sandwiched a dropped shot on the eighth with two further gains.
Dredge picked up a shot on the ninth to get back to 11 under, where Luiten had a single gain on the second and Hend was making a move at four under for the day through 12 holes.
Two-time Major Championship winner Bubba Watson was then at nine under alongside Nacho Elvira, Thorbjørn Olesen and Julien Quesne.
