3 JOHN- was written to Gaius, a friend of John and a leader in the church. There was a man named Diotrephes in Gaius’s church who was refusing to welcome messengers sent by John. He would not recognize John’s leadership. John wrote this letter to praise and thank Gaius for his help and to scold Diotrephes for not cooperating. John promised to come to this church soon to deal with this matter personally.
JUDE- like James, was a brother of Jesus. He wrote to warn Christians about the same false teachers Peter wrote about in his second letter. These false teachers were not only teaching that Jesus was not the Son of God; they were also leading the people to live sinfully. Jude warned that God would punished and destroy these false teachers just as he had punished sinners in the Old Testament.