Bent, who is currently on loan at Fulham, has one year remaining on his Villa contract, but Lambert insists that there is no chance of the 30-year-old returning to the first-team squad in the future.
Asked if Bent could force his way into his plans in pre-season, Lambert told reporters: "No, the club's moved on.
"Darren has not really played for me for two years. Obviously he's been on loan at Fulham, here we've had Christian's [Benteke] form and that's football. Whatever happens at the end of the season will happen."
Bent joined Villa from Sunderland for an initial £18m in January 2011.