marriage guidance 
noun [mass noun]
(In the UK) counselling of married couples who have problems in their relationship: a marriage-guidance counsellor...
- A counsellor from marriage guidance suggested people were not prepared for ‘coming together in one relationship’ and the adjustments that demanded.
- I never forgot it, and it came out during marriage guidance counselling several years later.
- Counsellors abandon marriage guidance classes in case they get sued should the couple divorce at a later stage.