Mechanochemical interaction of Fe powder with the liquid Ga-In eutectic in the Fe-rich concentration corner of the Fe-Ga-In phase diagram was studied and compared with binary Fe-Ga and Fe-In specimens. Slow formation of diluted solid solutions in the Fe-In system was confirmed. In the Fe-Ga system, the dominant concentrated A2 solid solution is formed with H-eff = 236 kOe, accompanied by ordered D0(3) and L1(2) phases. The Fe-Ga-In system features a stationary equilibrium between the concentrated A2 phase and D0(3) in the iron matrix.