The need for multi-story buildings and underground structures, such as subway and metro systems in built-up areas of large cities, often requires deep excavations. The design and construction of an adequate support system are essential to limit the unloading of the ground and minimize the damaging effects of the excavation on adjacent structures. This numerical study investigates the performance of a deep excavation in sandy soil supported by an anchored diaphragm wall. After validating the numerical model, parametric analysis has been performed using three fixed levels of anchors by varying the wall penetration depth, anchor inclination, and longitudinal spacing of the anchors. The study examines the impact of these factors on the variation of lateral wall displacement, ground surface settlement, and factor of safety of the anchors. Further, longitudinal spacing of anchors has been determined for different anchor prestress values as a percentage of anchor design load (60, 80, and 100%) after fixing the wall penetration depth in the first place and anchor inclination in the second place. The safety and serviceability criteria have been important considerations during the study. The findings indicate that there is a reduction in both the maximum lateral wall displacement and ground surface settlement as the wall penetration depth increases and the anchor inclination angle decreases. Furthermore, the factor of safety of anchors shows minimal variation with changes in wall penetration depth and anchor inclination angles.