The objection of the thesis is to design and analyze a 3 degree of freedom stacker crane mechanism for Mini Load Automated Storage and Retrieval Systems. Automated Storage and Retrieval System (AS/RS) is an automated system in which the product of a company to be stored is placed in or retrieved from specified location on a rack system by means of computer aided mechanism which is nothing but a stacker crane. This study first introduces an inclusive literature review on AS/RSs. Several types of AS/RSs are examined and the differences between them are introduced. Additionally, several types of stacker cranes in the literature are also presented. Moreover, the linear motion systems used in similar mechanism are explained briefly in the chapter. In the design chapter of the thesis, theory of the stacker crane mechanism is introduced. A conceptual design is created and, elements and sub-sections of the desired mechanism are presented with the conceptual design of the mechanism. After the conceptual design, critical design calculations are performed approximately before the detailed design of the mechanism. Afterwards, the detailed design of the mechanism is created and calculations are verified due to detailed design. The detailed design of the mechanism is analyzed using Finite Element Analysis methods in the analysis chapter of the thesis. Analysis of critical components and critical sub-sections of the stacker crane mechanism are analyzed using Computer Aided Engineering program. Revises are made according to the results of the FEA and design is validated at the end. At the prototyping chapter of the thesis, the manufacturing studies of the mechanism are presented. Manufacturing stages are introduced and experiments of the sub-section of the mechanism are done.