Pocketing the striker while covering the Queen
Two of your pocketed pieces are removed and placed on the board. You continue playing, trying to cover the queen. 

I'm referring to the ICF Laws of Carrom:


  101) a) While covering the Queen by a proper stroke, if a player pockets the striker along with his C/m, the C/m so pocketed plus one C/m as Due shall be taken out for placing by the opponent. The player shall however, continue his turn. If in that subsequent stroke no C/m of the player is pocketed, the Queen shall not be considered to have been covered and it shall be taken out for placing.