  We present the nonperturbative computation of renormalization factors in the
RI'-(S)MOM schemes for the QCD gauge field ensembles generated by the CLS
(coordinated lattice simulations) effort with three flavors of
nonperturbatively improved Wilson (clover) quarks. We use ensembles with the
standard (anti-)periodic boundary conditions in the time direction as well as
gauge field configurations with open boundary conditions. Besides
flavor-nonsinglet quark-antiquark operators with up to two derivatives we also
consider three-quark operators with up to one derivative. For the RI'-SMOM
scheme results we make use of the recently calculated three-loop conversion
factors to the modified minimal subtraction scheme.
