  We report the elliptic flow ($v_{2}$) of $K_{s}^{0}$, $\Lambda$,
$\bar{\Lambda}$, $\phi$, $\Xi^{-}$, and $\overline{\Xi}^{+}$ at mid-rapidity
for Ru+Ru and Zr+Zr collisions at $\sqrt{s_{\mathrm {NN}}}$ = 200 GeV. The
transverse momentum ($p_{T}$) and centrality dependence of $v_{2}$ have been
studied. The number of constituent quark (NCQ) scaling for all the
(multi-)strange hadrons has also been tested. The dependence in the ratio of
average $v_{2}$ ($\langle$$v_{2}$$\rangle$) on centrality shows a deviation
from unity indicating a difference in nuclear structure and deformation between
the isobars. The results show a systematic size dependence when compared to
Cu+Cu, Au+Au, and U+U collisions at similar beam energies.
