  We report the discovery of a substellar-mass co-moving companion to 2MASS
J22501512+2325342, an M3 candidate member of the young (130--200 Myr) AB
Doradus Moving Group (ABDMG). This L3 beta companion was discovered in a 2MASS
search for companions at separations of 3--18" from a list of 2 812 stars
suspected to be young (< 500 Myr) in the literature, and was confirmed with
follow-up astrometry and spectroscopy. Evolutionary models yield a companion
mass of 30 (-4,+11) Mj at the age of ABDMG. The 2MASS J22501512+2325342 AB
system appears to be a spatial outlier to the bulk of ABDMG members, similarly
to the young 2MASS J22362452+4751425 AB system. Future searches for young
objects around these two systems would make it possible to determine whether
they are part of a spatial extension of the known ABDMG distribution.
