Longman Dictionary of Contemporary English
marriage guidance
noun
EXAMPLES FROM CORPUS
▪ And even if there is a family counselling service or marriage guidance counselling there may be a waiting list.
▪ Courses on debt counselling followed together with requests for counselling courses to include bereavement and marriage guidance skills.
Wiktionary
marriage guidance
n. Advice or support (especially in the form of professional counselling) about marriage, typically as given to couples looking to overcome problems in a relationship. Often attributive.