I want to come to the Republic of Lithuania for less than 3 months

If you intend to stay in Lithuania for up to 90 days in any 180-day period, it is sufficient for you to have Schengen visa (if you are not subject to visa-free regime).

I want to visit the Republic of Lithuania for a short time (less than 90 days).

I have to stay in Lithuania longer than my Schengen visa is valid. What to do?