Series three includes correspondence between the National Association of the Deaf and national organizations, international organizations, schools, interoffice communications, and individuals from around the US. A very large portion of this series is dedicated to letters received and sent to persons in the United States concerned with matters of equality for the deaf that the NAD could possibly assist with. These letters are organized by the state from which they were received or sent to.

Series three includes correspondence between the National Association of the Deaf and national organizations, international organizations, schools, interoffice communications, and individuals from around the US. A very large portion of this series is dedicated to letters received and sent to persons in the United States concerned with matters of equality for the deaf that the NAD could possibly assist with. These letters are organized by the state from which they were received or sent to.