The interactive guitar-training tool was due to be released in Europe on September 14, but will now release on October 12, reports Eurogamer.
No explanation has been offered for the setback, although the title has been at the centre of numerous legal complaints, once for the use of the name Rocksmith and another time for alleged patent infringement.
Rocksmith will offer a bundle that includes a Gibson Epiphone Les Paul Junior guitar as well as the real tone cable, allowing the guitar to connect with an Xbox 360, PlayStation 3, PC or Mac. The bundle is currently listed on Amazon for around $130.
The UK release will feature an expanded tracklist, including the 45 tracks from the North American release plus additional content for over 50 total songs from artists including David Bowie, The Rolling Stones, Nirvana and Muse.
"Rocksmith has already seduced hundreds of thousands in North America and we are very proud to bring this game into our territories," Ubisoft chief marketing and sales officer Geoffroy Sardin said.
"The main reason for this success is that Rocksmith offers so much more than previous guitar games: the possibility to actually master a real instrument."
Announced by Ubisoft last year, Rocksmith will be available for the Xbox 360, PS3 and PC in October.
Watch a trailer for Rocksmith below: