Assign third-parties to a user group

Is there a way to assign a third-party to a group of users?

I mean, I have about 100 users distributed in 5 groups and the members of each group share their Third-parties (suppliers in my case). When I add a new supplier I have to assign it to the users one by one but it could be easier and faster to assign this supplier directly to a group of users, but I do not see any option to do that.

Does anyone know if it is possible?

Thanks