embarrassed silence
awkward silence
stunned silence

He continued to stare out the window, and finally I left his room in embarrassed silence.

There was an embarrassed silence at the other end of the line.

When left alone, the two friends at first kept an embarrassed silence.

I was always the fellow in school or university who couldn't bear the long, embarrassed silence.

There was a moment of embarrassed silence as the two left the room.

The other officers looked at him in surprise and for a moment there was an embarrassed silence.

They all stood there in embarrassed silence, as if the boy had run out suddenly naked.

There was an embarrassed silence among the three women in front of the fire.

They looked at one another in silence, embarrassed but defiant.

After he had gone, there was a moment's embarrassed silence.