  We report the synthesis, structure, and magnetic and transport properties of
a new ternary intermetallic compound PrRhSn3 which crystallizes in LaRuSn3-type
cubic structure (space group Pm-3n). At low applied fields the dc magnetic
susceptibility exhibits a sharp anomaly below 6~K with an irreversible behavior
in zero field cooled (ZFC) and field cooled (FC) susceptibility below 5.5 K.
The ac susceptibility exhibits a frequency dependent anomaly revealing a
spin-glass behavior with a freezing temperature, T_f = 4.3 K. The observation
of spin-glass behavior is further supported by a very slow decay of
thermo-remnant magnetization (mean relaxation time tau = 2149 s). However, a
small jump at very low field in the isothermal magnetization at 2 K and a weak
anomaly in the specific heat near 5.5 K reveal the presence of ferromagnetic
clusters. The frequency dependence of the transition temperature T_f in the ac
susceptibility obeys the Vogel-Fulcher law, nu = nu_0exp[-E_a/k_B(T_f-T_0)]
with activation energy E_a/k_B = 19.1 K. This together with an intermediate
value of the parameter delta T_f = Delta T_f/T_f Delta(log nu) = 0.086 provide
an evidence for the formation of a cluster-glass state in PrRhSn3. The magnetic
contribution of the specific heat reveals a broad Schottky-type anomaly
centered around 10 K and the analysis based on the crystal electric field model
indicates a singlet ground state. Further, below T_f the magnetic part of the
specific heat exhibits a T^{3/2} temperature dependence. The strong influence
of the crystal electric field and a T^{3/2} temperature dependence are also
seen in the electrical resistivity which reveals a metallic character and a
high magnetoresistance. We also obtain a surprisingly large value of
Sommerfeld-Wilson ratio R_W ~ 247$.
