| State: | AR |
| Type: | AR 1926 |
| Route: | 3 |
| Maint: | AHD |
| Formed: | 1926 |
| Deleted: | 1940 |
| Length Mi: | 263 |
| Direction A: | South |
| Terminus A: | at the Louisiana state line |
| Junction: | in Camden in Fordyce in Pine Bluff in Pine Bluff in Stuttgart near West Memphis |
| Direction B: | North |
| Terminus B: | northwest of West Memphis |
| Counties: | Columbia, Ouachita, Calhoun, Dallas, Cleveland, Jefferson, Arkansas, Prairie, Monroe, Lee, St. Francis, Crittenden |
| Previous Type: | AR 1926 |
| Previous Route: | 2 |
| Next Type: | AR |
| Next Route: | 4 |
Highway 3 (AR 3, Ark. 3, Hwy. 3, formerly State Road 3) was a state highway in southern Arkansas. Running predominantly southwest to northeast, its southern terminus was at the Louisiana state line approximately 18miles south of Magnolia, Arkansas. Its northern terminus was at U.S. Highway 64 approximately 3miles north of Lehi.[1] It was maintained by the Arkansas Highway Department (AHD), now known as the Arkansas Department of Transportation (ArDOT).
Between Magnolia and Lehi, Highway 3 was replaced in 1935 by US 79, splitting Highway 3 into 2 sections; one segment south of Lehi later became Highway 147 and Highway 50. In late 1936, Highway 3 had a third segment added between McNeil and Waldo. In 1939, the segment between Magnolia and the Louisiana state line was transferred to Highway 19. In mid-1940, the segment north of Lehi was replaced by Highway 147, and the segment from McNeil to Waldo was renumbered Highway 98.[2]