| When Sweet Sleep Returned | |
| Type: | Studio |
| Artist: | Assemble Head in Sunburst Sound |
| Cover: | Assemble Head in Sunburst Sound - When Sweet Sleep Returned (2009).jpg |
| Released: | April 7, 2009 |
| Genre: | Psychedelic rock |
| Label: | Tee Pee |
| Prev Title: | Ekranoplan |
| Prev Year: | 2007 |
| Next Title: | Manzanita |
| Next Year: | 2012 |
When Sweet Sleep Returned is the third studio album by American psychedelic rock band Assemble Head in Sunburst Sound, released in April 2009 on Tee Pee Records.