Please accept my deepest regrets.

Meaning

Expressing strong remorse.

Examples

• John: 'I'm so sorry, Alice. I caused the delay.'
• Alice: '<b>Please accept my deepest regrets</b>. I hope we can still salvage this situation.'
• John: '<b>Please accept my deepest regrets</b>; I'll do everything to rectify the situation.'
• Alice: 'The damage is extensive, John.'