B: God's plan is that we live a full, productive, and meaningful life here in the flesh. Suicide would be an individual's free will choice not to participate.
The Urantia Book's definition for suicide is "fleeing from the realities of mortal existence". Other than that there's no real discussion about the spiritual consequences of suicide in the book. My studies lead me to believe that suicide indicates not only a weakness of character but a high degree of selfishness and disregard for friends, relatives, and loved ones. The value of this one life in the flesh is emphasized continually throughout the book so to treat a precious opportunity with such disregard surely reaps consequences in the next life to come. Presumably a person arriving on the mansion worlds from a suicide doesn't encounter circumstances much different from those a person arriving because of natural death would but there will be more for them to learn in compensation for their weakness of character and lack of compassion.
Since our perspective of the meaning of life is so limited here it must be that no matter what difficult life situations we encounter it is important to meet them head on to the best of our ability.
The Urantia Book stresses that God the Father is forgiving - God gives second chances until they're no longer acknowledged by the recipient, until we decide we don't want another chance. I suspect then that the effects of suicide have a stronger effect upon the loved ones left behind than they do on the one who has departed.
Xerpi
