Nine days before Holt contacted Captain Jean-Luc Picard, the USS Hera, commanded by Captain Silva La Forge, departed Deep Space 3 on a routine courier mission. For five days, the station was in contact with the starship. After the ship vanished without a trace, Holt recruited the USS Nobel and the USS Excelsior for the task of finding the lost Hera. For seventy-two hours, the ships retraced the course of the Hera, without success. Holt planned on having the ships continue the search for another seventy-two hours; however, he did not think the additional time given to the ships would make a difference. (TNG: "Interface")
On one occasion, the Zebulon Sisters performed the Chu Chu dance at Deep Space 3, an event Beckett Mariner attended. She spoke of it in mid-2380, when she said she was just then coming down from the high. (LD: "Terminal Provocations")
|Deep Space stations|
|Deep Space Station K-7 • Tau Ceti Deep Space Station • Deep Space 3 • Deep Space 4 • Deep Space 5 • Deep Space 7 • Deep Space 9 • Deep Space 12 • Deep Space 253 • Hubble Deep Space Station • Deep Space Repair Beta Six|
This space station was only mentioned in dialogue.
According to Star Trek: Star Charts ("United Federation of Planets I") and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), Deep Space 3 was located in the Alpha Quadrant.