Hi aspirant

See if you paid the registration fee for the phase 2 and phase 3, it would not be refundable under any circumstances,so I would recommend you to definitely appear for phase two as well because it will boost up your preparation and confidence level. However if you do not want to appear for phase 2, it is absolutely fine and you can write the examination for third phase without any extra fee. Actually candidates are given freedom to appear for either one or two or all the phases of examination at their will and best performance would be taken into consideration while preparing the results.

Hope it helps!!