Does the sponsor's residence have to stay valid for my family reunification permit to continue?

Family reunification residence exists because a qualifying person already resides in Slovakia. The permit's validity is pegged to the sponsor's residence, so the two are closely connected.

If the sponsor's temporary or permanent residence ends, the family member's basis for staying can fall away as well. The practical takeaway is to manage both sets of permits together: renew on time, keep the sponsor's status uninterrupted, and report relevant changes. A lapse on the sponsor's side can directly jeopardise the family's status.