The phrase "deepest condolences" is a way to express sympathy and sorrow to someone who has experienced a loss or tragedy.
Sentences with «deepest condolences»
Our hearts, prayers and deepest condolences go out to the Crouch & @TBN family today, as we learned that Jan Crouch has passed away. (premierchristianity.com)
4 April 2011: AAAS / Science extends deepest condolences and heartfelt sympathy to the victims and people who have suffered from the Tohoku Pacific Earthquake. (sciencemag.org)
I remember him as a young engineer working at The State Energy Commission of W.A. Deepest condolences to his family and friends. (businessnews.com.au)