Only if you were planning to get married in that country. Getting a visa for purpose of marriage is a serious offense. Even in America some states make it a penalty to request marriage license then visa for your partner then not finish the task. I got hauled up once because i forgot to tell them I’m not using your document. Happy married now with visa. LOL
Not using it should not make much difference either way but using it and respecting its conditions (i.e. not overstaying/immigrating illegally) should weight positively in any subsequent application and help getting a multiple-entry visa. So if getting a visa was difficult for you, it could be a lost opportunity to establish yourself as a reliable visitor.
Actually, I was be granted a Schengen visa and ended up not going for a personal reason. And the next time I asked for another visa I didn’t get any question or rejection. Yeah don’t worry about that at all.
I’ve never heard anyone ever being refused a visa because another stamp in the same passport is unused. I can’t prove a negative, of course, but if it were me, I wouldn’t worry about it at all.
Credit:stackoverflow.com‘