A revolutionary three-degree-of-freedom (3-DOF) parallel mechanism was introduced, which was capable of dual-mode operation with partially decoupled motion. This mechanism can generate two distinct types of output motion—pure translational (3T) and two-translational-one-rotational (2T1R)—without the need to alter its topological structure during operation. This unique capability allowed the mechanism to adapt to different technological processes and fulfill a wide range of industrial requirements. Then a thorough analysis of the mechanism's topological, kinematic, and dynamic performances in both operational modes was conducted. The topological characteristics of the mechanism were carefully examined, and direct and inverse solutions for position, velocity, and acceleration were derived. Furthermore, an investigation into singular configurations was carried out to ensure the stability and reliability of the mechanism. Based on the direct position solution, the workspace of the mechanism was calculated, and workspace optimization was performed by using the differential evolution (DE) algorithm to enhance its performance and efficiency. Additionally, dynamics modeling of the mechanism was performed by using the virtual work principle and the serial single open chain method. This modeling allowed for the determination of driving force curves, which were essential for the design and optimization of the mechanism's drive system. Finally, a concise conceptual design was presented for the application of this mechanism in two operational modes on production lines. In the 2T1R mode, the mechanism was utilized for inkjet printing of drinking cups, demonstrating its precision and accuracy in positioning and motion control. In the 3T mode, the mechanism was used for boxing operations, showcasing its ability to handle larger loads and perform complex movements. This dual-mode capability of the mechanism offered unparalleled flexibility and adaptability for various industrial applications, making it a valuable addition to the manufacturing industry.