A multi-section slide assembly includes an outer slide, an intermediate slide, an inner slide, a positioning member, and an actuating member. The outer slide forms a locking tab. The intermediate slide is received in the outer slide. The intermediate slide defines two receiving slots and at least one slit. The positioning member is mounted to the intermediate slide, and includes at least one positioning tab extending downward therefrom. The positioning tab extends through the slit and abuts against the locking tab. The actuating member is mounted between the intermediate member and the positioning member. The actuating member forms two arms. Two arrises protrude downward from the arms of the actuating member and extend through the corresponding receiving slots of the intermediate slide. The inner slide is received in the intermediate slide. The inner slide is capable of being slid in to depress the arms of the actuating member to tilt the actuating member, whereby the positioning tab is lifted up to disengage from the locking tab.