Most of my 3DS games are rated E, none of the 3DS games I own are rated M, and only three of them rated T, which are Castlevania, Order of Ecclesia, Fates Birthright, and Shadows of Valentia.
I have more T-rated games on PC, such as Neverwinter Nights and Skullgirls and even some that are rated M like Saints Row 2.