The vice-captain's absence would be a blow to Chelsea and prevent Avram Grant from fielding his strongest team, but no attempt will be made to coax him into an early return, with the player's welfare the most important issue for the club.
Lampard had signalled a determination to make himself available by reporting for training on his own on Sunday, but he did not complete a full session yesterday.
The 29-year-old's mother, Pat, died from pneumonia last week.
A decision will be made today, but unless Lampard improves considerably he is unlikely to return to action before the funeral on Friday.