Interior mirror assembly with adjustable mounting assembly

An interior rearview mirror assembly includes a mirror casing, a reflective element and a mounting assembly for adjustably mounting the mirror assembly at an interior portion of a vehicle. The mounting assembly has a mounting base and a mounting arm adjustably mounted to the mounting base via a base joint. The reflective element is pivotally adjustable relative to the mounting arm via a mirror pivot joint. The base joint allows for adjustment of the mounting arm in generally a single plane and about a generally horizontal pivot axis when the mirror assembly is normally mounted in the vehicle, with the base joint limiting adjustment of the mounting arm about non-generally horizontal pivot axes. The mirror pivot joint allows for pivotal adjustment of a rearward field of view of the reflective element by a driver of the vehicle when the mirror assembly is normally mounted in the vehicle.