South Africa's Branden Grace and England's Richard Finch were in front by one stroke at the Joburg Open on Saturday before the third round was stopped because of darkness.
Grace had played 15 holes of his third round and Finch was through 14, leaving both at 15 under par. Canada's Andrew Parr and South Africa's Dawie van der Walt shared the clubhouse lead at 12-under 203 at the European Tour event.
Play was incomplete for the third straight day at Johannesburg and Kensington Golf Club. The tournament lost time Thursday and Friday because of thunderstorms.
Grace made five birdies in his 15 holes to move into a share of the tournament lead. Finch had an eagle, four birdies and two bogeys in his incomplete round.