  Dy$_{2}$Zr$_{2}$O$_{7}$ a disordered pyrochlore system, exhibits the spin ice
freezing under the application of magnetic field. Our studies suggest the
stabilization of pyrochlore phase in Dy$_{2-x}$La$_{x}$Zr$_{2}$O$_{7}$ with the
substitution of nonmagnetic La, along with the biphasic mixture for the
intermediate compositions. We observed that the higher La compositions (1.5
$\leq$ x $\leq$ 1.9), show spin freezing (T $\sim$ 17 K) similar to the field
induced spin ice freezing for low La compositions (0 $\leq$ x $\leq$ 0.5), and
the well known spin ice systems Dy$_{2}$Ti$_{2}$O$_{7}$ and
Ho$_{2}$Ti$_{2}$O$_{7}$. The low temperature magnetic state for higher La
compositions (1.5 $\leq$ x $\leq$ 1.9) culminates into spin glass state below 6
K. The Cole-Cole plot and Casimir-du Pr$\acute{e}$ fit shows narrow
distribution of spin relaxation time in these compounds.
