An employee might mentally check out for many reasons. They could have a personal issue or may be experiencing burnout. They might even be unaware that they've been slipping. Here are ways to manage such an employee:
Before the conversation
Learn about available support systems for the employee — including employee resource groups, assistance plans, and health networks.
Identify the specific requirements of the job that this person is not meeting. Be ready to present this during the conversation.
During the conversation
Provide them with a chance to tell you what's going on before sharing your assessment of their performance.
Be compassionate and make it clear you have a sincere desire to support them.
Discuss your priorities, be straightforward and specific about your concerns, and come up with a plan to reengage them in their work.
Be patient — but to a point. Getting an employee reengaged won't happen overnight. But if an employee is genuinely checked out, it ultimately might not be the proper role.