For a ceremony in the countryside, we recommend a pleasant mix of elegance and informality, to experience a day in the open air completely at ease, but with a note of character that fits well with the spontaneity of the situation.
For your tailored suit you can go for light colors, such as beige or olive green, but also stand out with a very original brick red.
The cut should be cool and informal, but still tailored: a two-button suit, with welt pockets, is a good choice for the occasion.
Then complete your look with a silk tie or matching a pocket square.