An ostomy support system, retrofit kit and deployment method may involve an ostomy pouch subsystem, a belt ring and a belt. The ostomy pouch subsystem includes a pouch, a wafer and a junction portion therebetween. The belt ring includes a junction-engagement aperture and first and second lateral securement portions disposed laterally of the aperture. The belt ring is configured to be repeatedly placed into and out of mounted engagement with the ostomy pouch subsystem. When the belt ring is in such mounted engagement, the aperture is in receipt of the junction portion and axially retained between the pouch and wafer. The belt includes two end portions configured for securement to respective belt securement portions. One or both end portions may be releasably securable to its respective belt securement portion by way of hook and loop fastener surfaces. Methods are also provided to deploy the ostomy support system on a wearer.
