“Can I stop tithing temporarily while paying off a debt?”
Tithing is a command first codified in the Law of Moses, though the concept of giving a tenth of everything you receive existed prior to the giving of the law. But Christians are not under law. At best, giving a tenth to God may be viewed as a guideline. What the Lord expected from Israel in times past serves as a useful starting point for Christian giving, though giving a tenth certainly does not exhaust the believer’s opportunity to serve the Lord by way of financial generosity.
It’s probably better not to think of it as “tithing” at all, but rather as an expression of our love for God.