I failed to anticipate the consequences.

Meaning

Apologizing for not foreseeing the outcome.

Examples

• John: 'I didn't foresee the problems this would cause, Alice.'
• Alice: '<b>I failed to anticipate the consequences</b>; I apologize.'
• John: '<b>I failed to anticipate the consequences</b>; I take full responsibility.'
• Alice: 'The impact of your decision wasn't considered, John.'