The major challenge associated with the stability of MSE (Mechanically Stabilised Earth) wall with marginal soil as backfill material is how it works in high water table conditions. The use of prefabricated vertical drains (PVDs) in the foundation soil may serve the purpose, but such studies are almost missing in the available literature on MSE walls. In this study, vertical drains have been used below the backfill zone of the MSE wall with marginal soil as backfill material to understand the changes occurring in the factor of safety (FS) and maximum displacements due to the rise in the water table. This study is based on modelling a 6 m high MSE wall with marginal soil as backfilling material using PLAXIS 2D. The wall is truly vertical with a high initial groundwater table at 3 m depth below the existing natural ground level. The wall has been modelled in 24 layers along with concrete facing panels to account for the staged construction gradually. The deformations of the MSE wall were analysed using three case studies at the end of the construction stage. The first case was simulated without PVDs, while the second case was modelled with PVDs on the foundation soil adjacent to the levelling pad, and in the third case, PVDs were kept below the reinforced soil zone. It is observed that the factor of safety has increased significantly (43.5%) in using PVDs below the reinforced zone. The maximum observed displacements in the MSE wall structure decrease with the rising water table using PVDs below the reinforced backfill zone.