RSA 281-A:21-a: Time Limitations for Filing Claim.

Compensation for disability, rehabilitation, medical benefits, or death benefits under this chapter shall be barred unless a claim is filed within 3 years after the date of injury; provided, however, that if the nature of the injury and its possible relationship to the employment are not known to the employee, the time for filing a claim shall not begin to run until the earlier of the following:

I. The date the employee knows, or by reasonable diligence should know, of the nature of the injury and its possible relationship to the employment; or

II. In the event of death, the date any dependent knows, or by reasonable diligence should know, of the nature of the injury and its possible relationship to the employee's employment.