High-pressure x-ray diffraction and Raman scattering studies on scandium tungstate [Sc₂₍WO₄)_3^]  show thatit transforms to a monoclinic phase at ~0.6 ± 0.3 GPa. The high-pressure phase has P2₁/a symmetry and is related to the initial orthorhombic phase through cell doubling along thecaxis. The compound undergoes another phase transition at ~1.6 GPa, accompanied by a volume reduction of ~8%. At ~6.5 GPa, the diffraction pattern and Raman spectra of [Sc₂(WO₄)₃] indicate the emergence of a disordered crystalline state which evolves into an amorphous phase beyond ~14 GPa. The structural changes are found to be reversible upto ~1.6 GPa. However, transformation to the amorphous state is found to be irreversible, though our results suggest some structural relaxation on release of pressure.