Yes, the probation period can be extended, as very well said by Mr. Saji and Mr. B. Sai Kumar. When you extend the probation period for an employee, the letter should be issued in such a manner that it is motivating but not discouraging. Can you draft the letter?
Drafting a Probation Extension Letter
We wish to inform you that we have evaluated your performance during the above period and are of the opinion that your performance is not in line with the Company's expectations. Based on the evaluation, it has been decided to extend your probation for a further period of ________ months, i.e., up to __________ Month.
Your superiors are more than willing to provide you with all inputs, knowledge, and guidance to help you perform as per expectations and grow in your career. The letter should be issued confidentially between the person, HOD/Manager of his, and HR.
We have to keep in mind the retention of the employee, as who knows, he could be an asset in the future.