A control mechanism for a drawer slide assembly which includes a first slide member and a second slide member. The control mechanism includes an adjustment member and a pair of stop members. The adjustment member is rotationally connected to the second slide member, and the pair of stop members are connected to the adjustment member and each have a stop portion located corresponding to the first slide member. The first slide member includes a catch portion which is located corresponding to one of the stop portions. The pair of the stop members are moved by rotation of the adjustment member. When the second slide member is retracted relative to the first slide member, the first and second stop portions are respectively adjusted and are engaged with the catch portion of the first side member to position the second slide member.