  The minimal (${\cal N}=1$) superparticle in three spacetime dimensions (3D)
is quantized. For non-zero mass it describes a spin-1/4 semion supermultiplet
of "relativistic helicities" (-1/4, 1/4). The addition of a parity-violating
Lorentz-Wess-Zumino term shifts this to $(\beta-1/4,\beta+1/4)$ for arbitrary
$\beta$. For zero mass, in which case spin is not defined, the quantum
superparticle describes a supermultiplet of one boson and one fermion.
