SEGA has recently registered 3D Shinobi III for Nintendo 3DS system. The PEGI system (Pan European Game Information) shows the new registration:

shinobi 3ds Leak: 3D Shinobi III coming to 3DS | VGLeaks 2.0

Lately, other older SEGA games for 3DS such as 3D Ecco the Dolphin or Galaxy Force II were also announced for the system as 3D remakes.

Thanks to NintendoEverything