The Manchester City centre back has struggled with numerous injuries over recent seasons that have limited his appearances at both club and international level.
The 30-year-old has featured in just six matches in all competitions for City this term, while his last appearance for Belgium came during a European Championship qualifier in October 2015.
Kompany has once again been overlooked for the Red Devils international double header against Greece and Russia later this month, but Martinez insists his captain still has a big role to play at international level, but he must first be given time to regain full fitness.
"We all know how important Vincent Kompany is for the Red Devils and how important he's going to be for the future," Martinez said.
"He wants to come even with one leg, that is his desire and commitment, but it's important that we protect him and we get the benefit from it. It is important we give him a bit of space and we allow him to get to match fitness. We want Vincent to be fully fit."