  An analysis of the radial distribution of ab-type RR Lyrae star periods in
the outer region of the globular cluster M3 at r >= 0.83 arcmin has been
performed. That analysis points towards a real shortage of stars with long
periods in the radial distance range 3.5 to 6 arcmin (or about 7 to 12 core
radii). A brief discussion is presented. The origin of the phenomenon remains
an open question.
