Posting attributed to "technical error."
The Nintendo of Europe website has designated March 25, 2011 as the release date for the 3DS iteration of Paper Mario. This date lies near the end of the promised 3DS launch range, which ends with Nintendo's fiscal year on March 31, indicating that the game will either be a launch title or release within the first few months of the 3DS system launch. So far, the title has only been shown as a non-interactive tech demo.
However, the site was later updated with the following message: "Release date is to be determined. A technical error previously stated an inaccurate release date. We are sorry for the inconvenience caused." The current website redirects to Nintendo’s main E3 site, but the page can be found through NOE’s website search.