Axar sustained multiple injuries during India's six-run loss to Bangladesh in their last Super Four match on Friday.
A hamstring injury ended the SRH all-rounder's participation in the tournament.
The 23-year-old Sundar, who has also had injures issues in his young career, last played an ODI in February earlier this year.
Sundar's saga of never ending injuries started back in July, 2021.
In another significant development, all-rounder Washington Sundar is set to fly to England to play for leading county side Lancashire.
Sundar suffered a split webbing on his bowling hand during the game against Gujarat Titans.
The selectors added Kuldeep Yadav to the Indian squad.
The 22-year old Tamil Nadu all-rounder tested positive for COVID-19 in Bengaluru.
The all-rounder is also in doubt for the Twenty20 World Cup to be held later this year.
Sundar is the third player after Shubman Gill and Avesh Khan to be ruled out of the tour.