Currently there are 16 native Standard Prime lenses for Canon 5D MIII and 10 of these lenses are autofocus (AF) type.
Canon 5D MIII doesn't have a sensor based image stabilization system but 1 of these Standard Prime lenses features optical image stabilization.
Since Canon 5D MIII has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 3 Standard Prime lenses with Weather Sealings.