The Husarion ROSbot 3 is an indoor mobile robot platform purpose-built for research and education, powered by a Raspberry Pi 5 with 8 GB RAM and a 64 GB microSD card. The standard version includes a SLAMTEC C1 LiDAR and Luxonis OAK-D Lite RGB-D camera, while the PRO version upgrades to a SLAMTEC S2 LiDAR and OAK-D Pro camera. It features a BNO055 IMU, VL53L0X time-of-flight distance sensor, dual-band WiFi, four DC motors with independent quadrature encoders, three 3,500 mAh Li-Ion batteries with protection circuits, and a durable 1.5 mm aluminum alloy chassis. Pre-installed open-source ROS 2 drivers enable out-of-the-box operation with web-based interface or gamepad control. It targets research and education.