3 is a greatest hits compilation by country singer Johnny Cash, released on Columbia Records in 1978 (see 1978 in music).

The release is notable in that it contains two songs - "It's All Over" and "Old Time Feeling," - which hadn't appeared on any Johnny Cash album before.

This was until the Reader's Digest box set The Great Seventies Recordings was released featuring this version of "It's All Over" "Old Time Feeling" was then rush-released as Cash's next single in October 1976, reaching the Top 30 at #26 C&W.

It was first released as the B-side of the popular #2 C&W hit "There Ain't No Good Chain Gang" (also with Jennings and also from the aforementioned album).

By November 1979, popular demand caused "I Wish I Was Crazy Again" to be issued as an A-side, almost making the Top 20 at #22 C&W.