Blackbird nest on drive

Hi the Blackbird nest that was on our drive the mother was sitting on the nest and the father was taking his turn then Sunday the 6th neither parent was on the nest and didn't return and it started to rain and I got worried. Monday came and went, and its now Tuesday an the nest is parentless.  I've seen the male he sits on next doors roof but she's gone. Could we have done more than just observe. what do we do now. Sad