失礼ですが
Meanings
1
Polite opener used before asking a personal question, making a request, or saying something potentially impolite. Softens the following statement.
Excuse me, but may I ask your name?
2
Used before disagreeing or correcting someone, especially in formal or business settings. Similar to 失礼ながら.
See also: 失礼ながら
With all due respect, I cannot agree with that opinion.