The consolidated regiment was assigned along with the 1st and 2nd Arkansas Consolidated Infantry Regiments to the 2nd (McNair's) Arkansas Brigade, 1st (Churchill's) Arkansas Division, 2nd Corps, Trans-Mississippi Department, from September 1864 to May 1865. On 22 January 1865, Major General Churchill was ordered to move his division to Minden, Louisiana, and occupy winter quarters. Union commanders in the Department of the Gulf reported on March 20, 1865 that General McNair's brigade was located at Minden, Louisiana, with the rest of Churchill's Division. In early April 1865, the division concentrated near Shreaveport Louisiana, and then moved to Marshall, Texas, by mid April 1865. The 3rd Arkansas Consolidated Infantry Regiment was stationed at Marshall, Texas, when the war ended, and was officially surrendered with the Department of the Trans-Mississippi by Major General E. Kirby Smith on May 26, 1865.