The WHO announced that in the next release of the International Classification of Diseases (ICD-11) Burn-out will no longer need to be diagnosed with a combination of other codes, but it will now be a recognized as a diseases under the code QD85.
Here is the official description, the WHO clearly separates stress related exhaustion from personal life and professional life.
Burn-out is a syndrome conceptualized as resulting from chronic workplace stress that has not been successfully managed. It is characterized by three dimensions: 1) feelings of energy depletion or exhaustion; 2) increased mental distance from one’s job, or feelings of negativism or cynicism related to one's job; and 3) reduced professional efficacy. Burn-out refers specifically to phenomena in the occupational context and should not be applied to describe experiences in other areas of life.