As of few weeks ago the Nap/ Massage and Shower/ massage were not open.

The "6 hr sleep lounge at departures level" is open but you will not have access to it as an arriving pax.

There is no arrivals lounge that is open at DEL as yet.

http://www.flyertalk.com/forum/india...es-del-t3.html

But then all three may be open by April.