A slide rail assembly includes a first, second, and third rail, The second rail is slidably connected to the first rail defining a second path. The third rail is slidably connected to the second path of the second rail. A front and rear support are respectively connected to a front end and rear end of the first rail. A stop member has a fixed section and a resilient section extending from the fixed section. The fixed section is fixed to the front support and the first rail. The stop portion is located at the resilient section. When the third rail is separated from the second rail and the second rail is retracted in the first rail, the stop portion prevents the third rail from being inserted into the second path.