The 3rd Cavalry Corps () was a cavalry corps in the Imperial Russian Army.
Composition 10th Cavalry Division 1st Don Cossack Division 2nd Combined Cossack Division (1915–1916) 12th Cavalry Division (1916–1917)
Part of 4th Army: 1914–1915 9th Army: 1915 6th Army: 1915 4th Army: 1916–1917 11th Army: 1917 1st Army: 1917
Commanders General F. A. Keller: 1915–1917 Lieutenant General Aleksandr Krymov: 1917 Lieutenant General N. L. Junakov: 1917 Major General Pyotr Krasnov: 1917
References A. K. Zalesskij I mirowaja wojna. Prawitieli i wojennaczalniki. Wyd. WECZE Moskwa 2000.