The second round had to be completed early on Sunday morning because of delays on Saturday, and the weather continued to hamper the tournament throughout Sunday's final round at the Ndola Golf Club.
Zimbabwe's Sean Farrell leads in the clubhouse on 10-under-par 209 after a superb 66 in the testing conditions. The next best in the clubhouse is Graeme van der Nest on 6-under following a 70.
But six professionals still have to complete their rounds, and will do so with a 6:30am start on Monday morning.
Of the group, Zimbabwean Mike Lamb poses the greatest threat at 6-under-par with two holes still to come. But despite Farrell's concern, his victory is surely beyond doubt. The diminutive professional's bogey-free round was a magnificent effort amidst the frustration of constant delays and pouring rain.
'I had a very solid front nine and turned 2-under. We then had a long rain delay, and when we went out again, I just decided to give it my all because I had nothing to lose,' said Farrell.
The result was five birdies coming in for a man who 18 months ago nearly died from complications following a severe car accident.
'I was very happy with my round. It was tough because the course was wet and I was never aware of who was doing what behind me. It's been stop and start like this for the last two days, and it's still not over.'
Farrell has won three times on the Zimbabwe PGA Tour, and finished top of their Order of Merit last year. But he has yet to claim a victory on the more lucrative Sunshine Tour.
'Hopefully this will be it,' he said. 'I've shot what I've shot and my tournament's over. I'll come back on Monday and see what the other guys have done. But I'm certainly not going to panic or lose any sleep about it.'
Earlier in the day, defending champion Titch Moore -- 2-under-par after the first round -- was disqualified after failing to arrive for the completion of his second round.