I'd posit that by definition an unintended consequence is one that wasn't intended. An unforeseen consequence would be on that was not foreseen. That's why we have those words.
You could play catch indoors and accidentally knock over a lamp. You absolutely foresaw that as a potential outcome, but you didn't intend for it to happen.
You could play catch indoors and accidentally knock over a lamp. You absolutely foresaw that as a potential outcome, but you didn't intend for it to happen.