That group contains overnight leaders Branden Grace and Chase Koepka, Zimbabwe's Scott Vincent, and Retief Goosen, the two-time U.S. Open champion who hasn't won a professional tournament since 2009. "Obviously, I have never been in this position before, so tomorrow, I'm just going to go and play and do my best".
France's Adrien Saddier, who shared the halfway lead with Paisley, could only manage a third round of 73 to fall three shots off the pace alongside American Chase Koepka and South Africa's Jacques Blaauw.
"The finish was awesome", the Frenchman said.
"I didn't know, I have a joint course record but it's quite cool".
Grace, the world number 30 and highest ranked player in the field, finished strongly with five birdies on the back nine for a total of 14 under-par for the tournament. I couldn't really do much, but yesterday was a good day for me."Koepka, a graduate of the European Challenge Tour, also made two bogeys in his round, also eagled the second, and made seven birdies for his 65".
Paisley's caddie and wife Keri helped guide him round for a brilliant 65 in Johannesburg
"At the moment it's weird, I feel like I didn't play incredible". Defending champion Graeme Storm missed the cut by a shot, though, thanks mainly to his opening-round 75. "I certainly hope that I can keep that trend (of Englishmen winning the SA Open) going".
He has eight European Tour career victories but has yet to lift his country's Open championship, which is the second oldest in the world having first been formally played in 1903.
After four front-nine birdies, he picked up three more during the inward trek but also bogeyed a couple of holes.
Grace, seeking back-to-back European Tour triumphs in South Africa, also came a cropper at the final hole, dropping a shot to post a 71.
Ernie Els, a five-time victor of the South African Open, made the cut after a 70 moved him to 3 under.