indiskrecija

1. indiscretion; tactlessness
   Izvinite na indiskreciji, koliko imate godina? — Excuse my indiscretion, how old are you?
   To pitanje mi je delovalo kao indiskrecija. — That question struck me as an indiscretion.
2. disclosure of confidential information; leak
   Zbog nečije indiskrecije novinari su saznali za sastanak. — Because of someone's indiscretion, journalists found out about the meeting.

The phrase "izvinite na indiskreciji" is often used before asking a personal question.