Originally scheduled for release on May 16, the collection will now launch at an unspecified point in June.
Revealing the news on Twitter, Insomniac said: "We've been informed the Ratchet & Clank HD Trilogy has been pushed back a bit in Europe to early June. Will share more when we have [a] date."
Announced in March after being outed by an online shopping site, the collection will include the first three games in the series - Ratchet and Clank, Ratchet and Clank 2: Locked & Loaded and Ratchet and Clank 3.
Each game features updated 1080p high definition graphics, 3D support, trophies and competitive online multiplayer.
The Ratchet and Clank series was originally developed for PlayStation 2 by Resistance developer Insomniac Games. The HD ports have been adapted by Idol Minds.
The North American release, titled The Ratchet and Clank Collection, will be available later this year. Sony says that the delay is to offer "something very special" for the tenth anniversary of the series.
Sony last year brought The Sly Collection to PlayStation 3 and recently released the Jak and Daxter HD Collection.
Watch a trailer for Ratchet & Clank 3 below: