Abstract In the induced magnetotail of Mars, the neutral sheet is an important channel for atmospheric ion escape, yet the role of heavy planetary pickup ions in shaping its geometry has been unclear. Using three‐dimensional hybrid simulations, we demonstrate that these ions induce a global neutral sheet asymmetry via mass loading. Ambient plasma flow deceleration bends draped interplanetary magnetic field (IMF) lines, extending the sheet along the +E ${+}E$ direction at large IMF Parker spiral angles and tilting its +E ${+}E$‐hemisphere segment toward the Y=0 $Y=0$ plane in the Mars–Solar–Electric coordinate system at small angles. The asymmetry’s magnitude is modulated by both the planetary ion production rate and solar wind dynamic pressure. These results show that Mars’ magnetotail is not solely governed by IMF draping and crustal fields, but also dynamically reshaped by pickup ions.