If you wear it like the second photo with a button hole flower and silver tie, then yes that is styled like you are part of a wedding party. That would be odd.
If you wear it in a similar way to the first photo, then it is just a smart grey trouser suit. I'd drop the shirt and tie and wear a coloured top of some kind under it to be less wedding suit like (just in case it matches the wedding party). With the right, less wedding like, accessories I think it would be absolutely fine.