Jasprit Bumrah sustained an injury to his left thumb while fielding in the first T20I against Ireland in Dublin on Wednesday.
India won the T20I series against Ireland 2-0. But ahead of a sterner test against England, it's a major blow for India. Bumrah is ranked 10th on ICC's T20I bowlers' ranking. He, though, is expected to be fit in time for the three-match ODI series that begins in Nottingham on July 12.
Sundar has been ruled out of the T20I series owing to a right ankle injury. He sustained this injury whilst playing football during India's first practice session in Dublin on Tuesday.
Replacements will be named by the BCCI in due course, with Shardul Thakur and Deepak Thakur's names being talked up.
Meanwhile, England too have made an addition to their T20I squad, but only for the first game in Manchester. Batsman Dawid Malan has been called in as cover for pacer Tom Curran who has a side strain, but the latter is expected to be fit for the last two games of the series.