  We investigate a squashing deformation of 3d N=2 supersymmetric theories on
three-sphere, which have four supercharges. The deformation preserves SU(2)_L x
U(1)_r isometry and all four supersymmetries. We compute the partition function
and find non-trivial dependence on the squashing parameter. We also consider
the large N limit of a certain class of quiver gauge theories which have free
energy of order N^{3/2}, and show that the free energy on the squashed sphere
differs from that on round sphere by a certain factor depending only on the
squashing parameter.
