After starting the day in a tie for the lead with defending champion Matthew Docking, Garrett recorded four birdies on his way to a 2-under par round, which has him leading the tournament outright on 5-under the card.
Garrett is just one shot ahead of South Australian Chris Duke, joining him is last year's runner-up Vernon Sexton Finck who has stormed into contention with a tournament low round off 66.
The final round is shaping up to be an exciting battle, with a number of Professionals within striking distance of the lead.
"Tomorrow should be a lot of fun and I am certainly looking forward to the challenge.I know if I continue to keep to my game plan as I have done over the first couple of days, the result will look after itself," said Garrett.
"Hamilton Island is such an amazing place, you sometimes have to pinch yourself to realise how lucky we are to have the opportunity to play such a prestigious tournament at this venue."
"This is my first time playing the PGA professionals Championship Final. I think I will be a little nervous on the first tee but I'm really looking forward to the chance to qualify for the Australian PGA Championship."
Although not please with his round today, Matthew Docking still remains in the hunt to claim a third consecutive PGA Professionals Championship on the Hamilton Island layout.
Docking sits three shots back from Garrett, and will be drawing on the experiences of the past two years in the final round as he looks to become the first three time winner of the Championship since Brad Burns in 2005.
The final round of the PGA Professionals Championship held at Hamilton Island Golf Club is now underway.
Headlines at a glance
- Gibson top Aussie in Panama 21.02.2017
- Scott off to good start at Riviera 21.02.2017
- Rumford dominates ISPS HANDA World Super 6 Perth 19.02.2017
- ISPS HANDA World Super 6 Perth round 4 draw 19.02.2017
- Thrills and spills as top-24 determined at the ISPS HANDA World Super 6 Perth 18.02.2017
- Hawkes flies low at Heidelberg 18.02.2017
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