List of 3ds games that, possibly, we won't see because of region locked.
Maybe some games will release, but they aren't confirmed right now.
Released
ONLY JAPAN
03/24/11 - Gundam the 3D Battle
07/07/11 - Class of Heroes 3D
08/04/11 - Nazo Waku Mansion
09/22/11 - Senran Kagura: Portrait of the Girls
10/27/11 - Brave Company
10/27/11 - Mameshiba
11/02/11 - Slime Mori Mori Dragon Quest 3: Daikaizoku to Shippodan
11/03/11 - Azito 3D
12/01/11 - Crayon Shin-Chan Uchuu de Acho Yuujou no Oba-karate
12/15/11 - Inazuma Eleven Go
12/15/11 - Moe Moe Daisensou * Gendaiban 3D
12/15/11 - Nekketsu Kouha Kunio-kun Special
12/15/11 - Penguin no Mondai Saikyou Penguin Densetsu!
12/15/11 - Puyo Puyo!! 20th Anniversary
12/22/11 - SD Gundam G Generation 3D
01/19/12 - Beyond the Labyrinth
01/26/12 - Zoo Keeper 3D
02/14/12 - New Love Plus
03/01/12 - Doraemon: Nobita to Kiseki no Shima
03/08/12 - Girls RPG: Cinderellife
03/08/12 - Hatsune Miku and Future Stars: Project Mirai
03/15/12 - If I Were in a Sealed Room with a Girl, I'd Probably XXX
04/26/12 - Dynasty Warriors VS
05/31/12 - Dragon Quest Monsters Terry's Wonderland 3D
06/14/12 - Gon Paku Paku Paku Paku Adventure
06/28/12 - Culdcept
06/28/12 - Tantei Jinguuji Saburo: Fukushuu no Rinbu
07/05/12 - Little Battler eXperience Baku Boost
07/12/12 - Pocket Soccer League: Calciobit
07/12/12 - Taiko no Tatsujin: Chibi Dragon to Fushigi na Orb
07/12/12 - Time Travelers
08/02/12 - Smile PreCure! Let's Go! Marchen World
08/30/12 - Senran Kagura Burst
09/06/12 - Lost Heroes
09/13/12 - Medabots
09/13/12 - Samurai Chronicles 2nd
10/25/12 - AKB48+Me
11/15/12 - UnchainBlades Exxiv
11/22/12 - E.X. Troopers
11/22/12 - Grandpa Danger Jya
11/29/12 - Professor Layton vs Phoenix Wright
12/13/12 - Inazuma Eleven Go 2: Chrono Stone
12/13/12 - Toriko Gourmet Monsters
12/27/12 - Fantasy Life
02/07/13 - Dragon Quest VII
02/21/13 - Magi: The Labyrinth of Magic
02/28/13 - Dragon Ball Heroes Ultimate Mission
02/28/13 - Osawari Tantei Nameko Shigeru
03/14/13 - Super Robot Wars UX
03/21/13 - Pretty Rhythm: My * Deco Rainbow Wedding
04/11/13 - Cardfight!! Vanguard: Ride to Victory
04/18/13 - Tomodachi Collection
04/25/13 - Meitantei Conan: Marionette Symphony
06/13/13 - Chousoku Henkei Gyrozetter
06/20/13 - Ninja Jajamaru-kun: Sakura-hime to Karyu no Himitsu
06/20/13 - Sayonara Umihara Kawase
06/27/13 - Digimon World Re
igitize Decode
ONLY KOREA
04/25/13 - MapleStory: The Girls Fate
ONLY AMERICA
11/20/12 - Adventure Time: Hey Ice King! Why'd You Steal Our Garbage?!
AMERICA/JAPAN
01/03/13 - Unchained Blades
Future releases
ONLY JAPAN
07/04/13 - Toriko: Gourmet Battle!
07/11/13 - Youkai Watch
07/18/13 - Danball Senki W Chou Custom
07/25/13 - Beast Saga: Saikyou Gekiotsu Coliseum
07/25/13 - Chibi * Devi! 2: Mahou no Yume Ehon
07/25/13 - Fantasy Life Link!
08/01/13 - Disney Magic Castle: My Happy Life
08/01/13 - DokiDoki! PreCure Narikiri Life!
08/08/13 - Elminage Gothic 3DS Remix
08/08/13 - Nekketsu Kouha Kunio-Kun SP: Rantou Kyousoukyoku
08/08/13 - One Piece: Romance Dawn - Bouken no Yoake
08/08/13 - Zyuden Sentai Kyoryuger: Game de Kaburincho!!
08/22/13 - Conception II
09/14/13 - Monster Hunter 4
09/19/13 - Mushi Bugyou
09/26/13 - Fate/Kaleid Liner: Prisma * Illya
10/03/13 - SPEC: Ten
10/17/13 - Exstetra
?? - Danball Senki Wars
?? - Devil Survivor 2: Break Record
?? - Dragon Marked for Death
?? - Gaist Crusher
?? - Jam with the Band
?? - Kaio King of Pirates
?? - Metal Max 4: Moonlight Diva
?? - One Piece: Unlimited World RED
?? - Puzzle & Dragons Z
?? - Retro Game Challenge 3DS
?? - Witchs Hat in the Magical Town
ONLY AMERICA
10/29/13 - Regular Show: Mordecai and Rigby in 8-bit Land
11/12/13 - Adventure Time: Explore the Dungeon Because I DON'T KNOW!
ONLY AMERICA/JAPAN
08/03/13 - Hakuoki: Memories of the Shinsengumi
08/13/13 - Rune Factory 4
?? - Etrian Odyssey: Millenium Girl