Final answer:
Act 3 of 'The Crucible' by Arthur Miller takes place in 1692 during the Salem witch trials at the Salem courthouse.
Step-by-step explanation:
The play The Crucible by Arthur Miller is set in the year 1692, specifically during the Salem witch trials. Act 3 of the play also takes place in this year. The events unfold in the Salem courthouse, where the trials are being held, and dramatic confrontations occur as the characters are swept up in the hysteria and accusations of witchcraft.