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Their total luminosities, $M_V$(DES1) $ = -1.42\\pm0.50$ and $M_V$(Eri III) $ = -2.07\\pm0.50$, and mean metallicities, [Fe/H] $=-2.38^{+0.21}_{-0.19}$ and [Fe/H] $=-2.40^{+0.19}_{-0.12}$, are consistent with them being ultra-faint dwarf galaxies as they fall just outside the 1-sigma confidence band of the luminosity-metallicity relation for Milky Way satellite galaxies. 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