Due to the likelihood of inclement weather in Georgia on Sunday, Masters officials have revised tee times with play now getting underway at approximately 12.30pm UK time (7.30am local time).
Francesco Molinari heads into day four with the advantage, with a third-round 66 putting him on 13-under par and two shots in front of Tony Finau and Tiger Woods.
Finau enjoyed the joint-best third day of any player with six birdies and an eagle to manage an eight-under par and put himself right in contention, while Patrick Cantlay and Webb Simpson also managed 64s. There had never previously been more than one round of 64 holed in the same Masters.
Open champion Molinari carded four successive birdies on the back nine to continue his excellent form, having never finished better than tied for 19th at the Masters.
And legendary golfer Woods, who is without a Major since his 14th back in 2008, has enjoyed an excellent three days at Augusta so far as he searches for a fifth green jacket.
Molinari, Finau and Woods will be the last threesome, with the trio of leaders expected to tip off at 2.20pm.
Brooks Koepka is only three shots off Molinari as the only player on 10-under par while Webb Simpson and Ian Poulter are both nine-under.
Jordan Spieth and Rory McIlroy, meanwhile, are well out of it at four-under and one-under heading into the last day.
Masters 2019 Day Four tee times
All times BST
12.30: Aaron Wise, Marc Leishman, Si Woo Kim
12.41: Matthew Fitzpatrick, Kevin Tway, Patton Kizzire
12.52: Henrik Stenson, Hideki Matsuyama, Cameron Smith
13.03: Jordan Spieth, Tommy Fleetwood, Corey Conners
13.14: Jason Day, Bubba Watson, Lucas Bjerregaard
13.25: Justin Thomas, Phil Mickelson, Jon Rahm
13.36: Adam Scott, Patrick Cantlay, Thorbjorn Olesen
13.47: Louis Oosthuizen, Dustin Johnson, Rickie Fowler
13.58: Matt Kuchar, Justin Harding, Xander Schauffele
14.09: Brooks Koepka, Webb Simpson, Ian Poulter
14.20: Francesco Molinari, Tony Finau, Tiger Woods
12.30: Kyle Stanley, Viktor Hovland (a), Charley Hoffman
12.41: Kevin Kisner, Bryson DeChambeau, Takumi Kanaya (a)
12.52: Rory McIlroy, Keegan Bradley, Gary Woodland
13.03: Jimmy Walker 72 72 72 216 53 J. B. Holmes 70 72 74 216 22 Charles Howell III
13.14: Kiradech Aphibarnrat, Kevin Na, Alvaro Ortiz (a)
13.25: Patrick Reed, Devon Bling (a), Keith Mitchell
13.36: Tyrrell Hatton, Satoshi Kodaira, Andrew Landry
13.47: Bernhard Langer, Rafael Cabrera Bello, Eddie Pepperell
13.58: Branden Grace, Martin Kaymer, Haotong Li
14.09: Emiliano Grillo, Zach Johnson, Billy Horschel
14.20: Trevor Immelman, Alex Noren