Universe 3 is an anthology of original science fiction short stories edited by Terry Carr, the third volume in the seventeen-volume Universe anthology series.

The book collects seven novellas, novelettes and short stories by various science fiction authors, with an introduction by Carr.

Theodore Sturgeon reviewed the anthology favorably, citing Carr for selecting "literate and thought-provoking stor[ies] bearing a special texture.

"Many Mansions" placed eleventh in the 1974 Locus Poll Award for Best Short Fiction.

"The World Is a Sphere" placed sixteenth in the 1974 Locus Poll Award for Best Short Fiction.