Maastrichat classification category 3 stands for DCD donor of:
Brought dead patient
Cardiac arrest during brain dead
Awaiting cardiac death after withdrawal of supports
Cardiac arrest and unsuccessful resuscitation in hospital
Ref. Sabiston Textbook of Surgery. Pg. 877
 
MAASTRICHAAT CLASSIFICATION OF NHBD
Category 1 : Dead on arrival at hospital
Category 2 : Death with unsuccessful resuscitation .
Category 3 : Awaiting cardiac death .
Category 4 : Cardiac arrest while brain dead .