The 35-year-old sustained an injury in his right calf during his side's defeat against Royal Challenger Bangalore in Pune on Friday.
"Over & out, India! Injuries are all part of the job! Horrible tear in my calf! Sad to be leaving a really great bunch of boys but looking forward to being back with my family! London bound for a summer off! Vacation till November! Bye for now! Lots of love, KP xxx," KP wrote on his Instagram account.
The Supergiants are reeling at second last position in the IPL 9 points table, having three defeats from four games in their maiden season.
IMAGE: Kevin Pietersen of Rising Pune Supergiants is helped off the field after injuring his leg during the match against Royal Challengers Bangalore.
Photograph: BCCI