Unless the atmosphere is so thin that the added weight of the parachute and it's support hurts more than it helps. 0.6 kPa is really that bad. The effectivenes

Unless the atmosphere is so thin that the added weight of the parachute and it's support hurts more than it helps. 0.6 kPa is really that bad. The effectiveness of a parachute grows at a square of your airspeed. This means that every planet has a minimum speed you can successfully slow down to using parachutes with a given system. For realistic loads and conventional materials, on Mars that is about 50m/s. Which is just too fast.