Folau, who has scored an incredible eight tries in four games this season, suffered a throat injury during last weekend's 32 8 victory of the Rebels.
South Africa against the Stormers on 5 April.
Israel Folau for Saturday's Super Rugby clash with the Sharks after he was ruled out through injury.
Waratahs head coach Michael Cheika told the Sydney Morning Herald: "If you think about it, he's come off the back of two Adidas Energy Boost Vivid Teal
Man management"Wherever I can manage him in training and in games I will. Sometimes for a player, that 10 minutes at the end of a game when the game is pretty comfortable gives them the chance to wind down a bit earlier.
"It's a little thing but little things can add up."
AFL seasons, so he hasn't had that contact element, then he's had a full year of (Super and Test rugby) last year.
Cheika says the Waratahs must get used to life without Folau, and they have capable replacements in fellow internationals Kurtley Beale and Adam Ashley Cooper.
Folau will return to the Harden Vol 1 Shoes specialist on Thursday and that will determine whether he will feature in the Waratahs' second game in Adidas Duramo Cross Trail Running Shoe
The Waratahs will be without in form full back Adidas Energy Boost Black Yellow
back Israel Folau ruled out of Sharks game
That was later confirmed as a haematoma by a specialist and the Waratahs are unwilling to risk the dual code international on a long haul flight to South Africa.
"He's only had one small injury (during the British and Irish Lions tour) so he missed one game, and I'm mindful that there's a cumulative effect.
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