How to evict if tenant has left property and cannot be located

[Ken Law]

I have a unique  eviction situation. My tenant was late on payment of rent and then went silent with communication. I stopped by the house and found that the tenant had subleased the house without approaval (prohibited in my lease) and has mostly moved out (just a few bags of clothes and random items). I still cannot reach the original tenant but have delivered a 3 day pay and quit for non payment of rent and violation of the lease to my house because I can not locate the tenant.  If I don’t hear from her, should I proceed with filing the eviction with the court or just quit the lease and then replace her with a new tenant.  If I find new tenants, can I still sue for unpaid rent if I never filed for eviction with the court?

The subletted tenants weren’t aware of the unapproved sublet. I’m evaluating them as potential replacement tenants if all checks out.