Major part of Kerala is covered with lateritic soil. Lateritic soils, in general, can withstand high stress under unsaturated conditions. However, during rainfall infiltration, there is a tendency that the lateritic soil may undergo large and sudden deformation. In the recent past, Kerala experienced heavy rainfall induced distress. Associated with the rainfall event, a series of landslides and formation of cavities and subsidence of ground were observed in many parts of Kerala. Mechanically stabilised earth (MSE) structures such as reinforced soil walls and slopes can be used in landslide mitigation; especially in slide repair using the slide mass as the backfill. In the present study, soil was collected from a nearby site where landslide has occurred due to heavy rainfall. Experimental studies were conducted to study the collapse potential of the soil. An attempt was also made herein to investigate the deformation behaviour of geosynthetic reinforced soil slope resting on foundation soil subjected to rainfall induced subsidence.