An EPR study of the Mn spectra in Li‐diffused Mn‐doped GaAs is presented. The EPR spectra show that the symmetry at the Mn site is orthorhombic. This thus indicates association between the Mn and Li impurities. A model is proposed which is consistent with the observed symmetry at the Mn site, the donor impurities, and with the infrared absorption of the localized vibrational modes of the Li impurities as observed by Lorimor and Spitzer.