prereturn

adjective

pre·re·turn ˌprē-ri-ˈtərn

variants or pre-return

: occurring or required before a return to a place or activity

Some speak at … prereturn briefings for military families, lecturing them on what to expect … after their soldier's return.

Audrey Kubetin

He said astronauts usually must spend their prereturn day in orbit dismantling and putting away equipment used during the mission.

The Los Angeles Times