If I come,— When I come. See 1 John 3:2. 2 Corinthians 13:2. Diotrephes's turning out of the church such as displeased him, renders it highly probable that he was bishop or pastor of that church. See the former note.
Related Commentaries of 3 John 1:10
3 John 1:10
10 Wherefore, if I come, I will remember his deeds which he doeth, prating against us with malicious words: and not content therewith, neither doth he himself receive the brethren, and forbiddeth them that would, and casteth them out of the church.