I have an exit re-entry visa for Saudi Arabia. I exited Saudi Arabia to India this month. I have plans to visit Canada from India. Is it possible to directly travel to Saudi Arabia from Canada using my exit re-entry visa without coming back to India? Is there a condition that exit and re-entry should be to/from the same country?
No, there is no such condition.
Visas occasionally specify allowed points of entry, but I've never heard of a visa for any country specifying a point of departure.