A slide rail assembly including a first rail, a second rail, a third rail, a first supporting device, and at least one supporting member is provided. The first rail includes a first end portion and a second end portion that are opposite to each other. The second rail is longitudinally movable relative to the first rail. The third rail is longitudinally movable relative to the second rail. The first supporting device exceeds the first end portion of the first rail for a predetermined longitudinal distance. The at least one supporting member is arranged on one of the second rail and the first supporting device.

A slide rail mechanism is provided and includes a supporting member, a slide rail assembly and a rolling member. The slide rail assembly and the supporting member are displaceable relative to each other. The rolling member is arranged on one of the slide rail assembly and the supporting member. The slide rail assembly is configured to engage with the supporting member via the rolling member.