Scheduled for today (June 13), a spokesperson for the BBC confirmed the game has been "slightly delayed", but has yet to provide a new release date.
"The Vita version is undergoing additional testing and will be slightly delayed to ensure we deliver the best version for Doctor Who fans," read the statement issued to Digital Spy.
Both the PS3 and Vita versions were originally scheduled for March. The PS3 version was released last month at PSN and retail.
Doctor Who: The Eternity Clock is the first of three planned releases by BBC Worldwide, and will be a PlayStation timed exclusive in Europe before releasing on PC later in the year.
The Vita version will offer a number of unique features, including Near support and save sharing between platforms, which ties into Sony's vision of "console quality gaming" in the mobile space.
> Read our review of Doctor Who: The Eternity Clock
Watch the Doctor Who: The Eternity Clock launch trailer below: