Archer, 25, was dropped after the 1-0 defeat at Rotherham United at the end of August.
Amos has played the last 14 matches but is not able to face Bolton as part of his loan agreement.
Archer’s loss of number one status with Millwall has also seen him fail to make recent Scotland squads.
David Martin is another option to replace Amos.
Lions boss Neil Harris said: “Both have been outstanding in training. They are great characters and both have been patient.
“Both of them come into the squad at the weekend and it is a decision for me over who to play. I know that whoever I pick will be ready and want to grasp the opportunity to get a run of games in the team.
“If you play well you stay in. It is the way we work and the way it will always work.
“Individual performances are key to team success. But you also have to have that mentality that the team comes first.”