Due to the aggregating feature of the parking lot, it can be served as a distributed energy resource (DER) for distribution grid. This study presents the impact of electric vehicle parking lot (EV PL) on distribution system reliability level for an intended operation period. Stochastic storage capacity model of a sample EV PL that was recently proposed is used for the assessment of the aforementioned impacts on the reliability level of a distribution feeder located at the Thrace part of Istanbul distribution system. Reliability improvement of distribution system through EV PL is evaluated using SAIFI, SAIDI, and ENS indices. Moreover, impacts of EV PL on load point reliability indices are also evaluated and discussed.