Cameron Smith will take a three-shot lead into the final round of the Australian PGA Championship following an error-free round on day three at Royal Pines.

The overnight leader maintained his fine form from the previous day, when he recorded the lowest round of the week with a 65, by shooting a 67 on Saturday to move to 14 under par and extend his advantage at the top of the leaderboard.

Smith spread five birdies across a flawless round of golf, while Marc Leishman (69) did his best to keep up and finished three shots back in second place.

Contending youngsters Dimi Papadatos and Jake McLeod, who was tied for the lead after the first round, found it tough on day three as they jostled for order of merit honours, leaving Matt Millar tied with 2017 champion Harold Varner III in third on seven under par.

Victory for Smith would see him become the first player to win back-to-back Australian PGA Championship titles since Robert Allenby in 2000 and 2001.

On Friday, all three Irish players Down Under - Michael Hoey, Cormac Sharvin and Robbie Dawson - missed the cut. 

"The last year I've been playing some really good golf," Smith told "Probably over the last three days has been some of the best golf I think I've played both mentally and pulling off the shots. I'm feeling really confident and looking forward to tomorrow.

"I did a really good job today when I was out of position, just taking less risks and putting myself into the centre of the greens and taking a par. It's what you have to do around here.

"There's plenty of birdie opportunities out there and that's what you have to realise and I did a good job of that."

Home favourites Braden Becker, Ben Eccles and Matt Jager finished the day eight shots off the lead on six under par, one clear of McLeod.