Ishant bowled six overs on the second day evening but did not take the field on the third day at all.
Asked about Ishant's absence from action, a member of Delhi team management said that he has pulled his hamstring.
Delhi bowling did lack incisiveness in Ishant's absence as Haryana managed 265 in their second innings with Manan Sharma picking six wickets.
Ishant, in any case, will be missing the first Test due to ICC ban but if hamstring injury turns out to be serious then it might lead him to miss the second Test in Bengaluru as well.
The Indian team for the final two Test matches will be selected on Monday, October 19.