The Information and Broadcasting Minister, who represents Ludhiana constituency in Lok Sabha, may not be in a position to fight elections and is learnt to have apprised the party leadership of his health condition.
48-year-old Tewari has not been keeping well for the past several days and had earlier gone to AIIMS for treatment.
He was admitted to Max Hospital in south Delhi on Saturday.
His hospitalisation could not have come at a more inopportune time for Congress as Tewari is a vocal leader and a good orator besides being a senior party spokesman.
Congress has not announced the party candidate for Ludhiana and he was expected to be re-nominated from the seat.
Earlier, there was a speculation that Tewari wanted to contest from Chandigarh seat from where former Union Minister Pawan Kumar Bansal was re-nominated.
The Information and Broadcasting Minister had recently trashed reports that he was keen on changing his constituency, saying he was prepared to fight from Ludhiana if his party decided to field him.
Party's Central Election Committee is likely to take a decision on Punjab and Delhi soon after Holi.
People have exaggerated notions about themselves: Pawan Bansal
Cong hints at giving Chandigarh LS seat to Pawan Bansal
SC stays execution of 2 convicts in Dec 16 gangrape-murder case
Unfair to call Bansal tainted: Cong
'When our netas speak of values, they don't mean it'