Yes, it is possible to apply for a semester-long leave of absence (“Urlaubssemester”) under certain conditions. For more information on how to apply for a leave of absence at FU, please see here.
Please note: Taking a leave of absence can have an impact on various bureaucratic matters (e.g. on grants or scholarships, social insurance contributions, tax matters, child benefit and allowances, …). If you need more information or advice on whether or not taking a leave of absence is a good choice in your specific situation, please contact FU's student advisory services.