Currently there are 24 native Macro Prime lenses for Canon 5D MIII and 18 of these lenses are autofocus (AF) type.
Canon 5D MIII doesn't have a sensor based image stabilization system but 6 of these Macro 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 7 Macro Prime lenses with Weather Sealings.