Ambrose missed Saturday's FA Cup defeat at Coventry with a hamstring problem and Marrow, who recently signed a permanent deal from Blackburn, sat out with an ankle injury.
Pablo Counago could start alongside recent signing Steffen Iversen in attack after the Spanish striker came on before half-time at the weekend in place of Alessane N'Diaye.
Defender Claude Davis was an unused substitute after a hamstring strain and could be drafted in if Freedman opts to make further changes.
Freedman, who scored 108 goals in two spells with Palace, was handed a two-and-a-half year contract to become George Burley's successor this week.
Source: PA
