Check your ticket from the Maledives to India. Is this booked as two separate flights with a stopover or as two connecting flights? That is the important question.

If it is booked as stopover you will be ok as long as you can enter Sri Lanka. Just check in for your next flight to CMB, pick up your bags and never show up for your next flight.

If it is booked as a connection you might run into the following problems (as has been said)
= The airline might to refuse to showt check your bags to CMB. Some airlines have such policies, not sure about UL.
- The airline will issue two boarding passes for the two flights and will check if you are able to enter India. If not they most likely will not allow you to check in at all.