According to an interview with ConservativeNewMedia, the 3DS version of The Legend of Zelda: Ocarina of Time will have Master Quest.
The 3DS version of the game will have the original version as well as the more difficult Master Quest. Master Quest featured reworked dungeons along with new puzzles that were not featured in the original game. There was also more tougher enemies too!
No release date for the game has been announced but it is expected to come out later this year exclusively for Nintendo 3DS.
You can check out the video below courtesy of ConservativeNewMedia: