Cat not going home and we are not feeding it!

Folks

There is this cat that usually come to our house (7 years). However,
during the last few weeks, it does not seem to be going back to its
home. It stays in the garden (even when it rains). We are not
feeding it either.

When he gets in our house, he just wants to sleep. He is smelly as
well. We are worried for it and would like it to go back to its
normal habit, i.e going back to its home. Can you please give some
advice.

Faisal...