Expected $^{3}\overline{\mathrm{He}}$ cosmic–ray fluxes near Earth before (Left) and after (Right) solar modulation~. The latter are obtained using Force Field with modulation potential $f = 400$~MV. Upper panels show the fluxes of antihelium nuclei for signal (dark-matter decay, in red) and background (ordinary cosmic rays, in blue) for various cases of inelastic cross section used in the calculations. Bottom panels show the transparency of our galaxy to the propagation of $^{3}\overline{\mathrm{He}}$. Shaded areas on the top-right panel show expected sensitivity of the GAPS~ and AMS-02~ experiments.