With no further need for hospital ships by that time, "Shamrock" was taken out of service. After the possibility of refitting the ship to carry home war brides was rejected, "Shamrock" was turned over to the War Shipping Administration at San Francisco on 4 February 1946, and placed in the National Defense Reserve Fleet (NDRF) at Suisun Bay, California. On 30 December 1947, "Shamrock" was sold to the Walter W. Johnson Co., and on 4 February 1948 was withdrawn from the NDRF for scrapping.