Fiancé is pronounced fee-ahn-SAY (IPA /ˌfiːɑːnˈseɪ/). Three syllables; stress 'SAY' at the end — French-style.
IPA: /ˌfiːɑːnˈseɪ/
Syllables: fee · ahn · SAY
Common ESL mistake: Learners say 'fee-AN-see' with wrong stress and final vowel.
Tip: Three syllables; stress 'SAY' at the end — French-style.