A Deism

1. A philosophical belief in the existence of a god (or goddess) knowable through human reason; especially, a belief in a creator god unaccompanied by any belief in supernatural phenomena or specific religious doctrines. Deism - Wikipedia
2. Belief in a god who ceased to intervene with existence after acting as the cause of the cosmos.

Usage notes

The word is often capitalized when referring to the rise of such beliefs in 17th and 18th century Europe and America.