This paper reports the results of suction-controlled triaxial tests performed on unsaturated compacted silty sand specimens subjected to various initial anisotropic stress states and suction states. A double-walled triaxial cell working in suction control condition by axis translation technique have been used to control matric suction and measure the variation of pore volume of the samples. All the specimens were initially subjected to specific values of initial suction and total anisotropic stress, and then, wetted by finite decreases of suction. During wetting, deformations with time were measured. It was found that wetting behavior of soil specimens depends on initial density, initial suction and initial anisotropic stress level. For a given density, the specimen deformation increases with initial suction and anisotropic stress state. Wetting from high level of initial suction or initial deviatoric stress state, leads to specimen collapse. For given initial suction and stress state, deformation of specimen, on wetting path, increases with decreasing in initial density. Finally, deformation rate on wetting path depends on the level of external loading, density and matric suction.