@italeigha I know what you were asking - I was just imagining any husband keeping up with a Basenji ! It makes a lovely imaginary picture !
To be entirely honest, no. I do not think he will keep up a steady pace alongside your husband. He will feel constrained, but he will follow his natural instincts inspite of the lead. He will dart here, there, cross in front, behind, trip the man up. He will want to be on the left side, and then the right, and suddenly he will STOP. Dead. For no reason that your husband can fathom.
He has seen or sensed something which is beyond the ken of man.
Three miles ? I do three on a good day when my knee isn't playing me up and Mku, my current tri-angel, does at least 8 or even 12. Assessments vary. A dog does 3, 4, even 5 times the distance over a three mile stretch. I would say Mku does a good 3.5 times what I do !
I think, if you want a steady trotting dog, docile, running along at your husband's pace for 3 miles, get another breed. If he is prepared to teach recall and has a sense of humour, or he is prepared to fit in with the Basenji's idea of how to cover those three miles, then by all means, there is no breed more satisfying to have in your life as a Basenji. Or two, or even eight.