A catheter assembly including a catheter handle and a catheter assembly with a catheter element and a container for accommodation of the catheter element. In a first compact configuration, the catheter element and the catheter handle are separated to reduce the length of the catheter assembly. The catheter element is in the container and the catheter handle is attached on the outside of the container assembly. The catheter handle can be detached and interlocked with the catheter element to constitute, in a second configuration, a catheter device.