By definition, rodeo 3s don't exist.  A rodeo is a flip with a spin, and since a full flip is 360 degrees, the minimum amount of spinning in a rodeo is 540 degrees.  Most flat 3s aren't actually flatspins, but since they're not rodeos they're just shoved under that category.  I call flat 3s wackflips, cause they're just slightly off axis, and most of the time with a japan or safety grab.