intice to the other of its intention to not renew this agreement at least three months

错字太多，话也没说全。
notice to the other party of its intention not to renew this agreement as least three months in advance.
与你上一句话和在一起翻：
除非另一方，至少提前3个月，以书面方式通知另一方其不需延期本协议。