Leakage error is well-known limiting factor in the application of satellite gravimetry in continental hydrology. Most of the efforts in leakage recovering are based on hydrological models to model terrestrial water content variations. Those methods do not account for mass variations from water bodies, glaciers and Glacial Isostatic Adjustment. These components may have considerable effects as in the Caspian Sea. In the current research, the effects of large mass anomalies on the total leakage to the Caspian Sea are investigated. Among the mass anomalies, two Aral Sea and Urmia Lake have a measurable effects during the studies period, which is in the result of on-going droughts in the region. The effect of the two lakes are particularly seen in the leakage time series on 2013 and 2019-2020. In Addition, the contribution from Caucasus mountain glaciers and GIA are estimated.