Русско-англо-русский юридический словарь

of (one's) own free will

Done according to one's own volition, without pressure or influence from others. She decided of her own free will to drop out of art school and pursue a career in law. (Farlex Dictionary of Idioms)

The 26-year-old is the fourth celebrity to drop out of the competition because of an injury. (BBC)

He was unfortunate to have to drop out of the game because his baby was ill. (BBC)

Eventually firms go under, run out of cash or drop out of the game. (Implications of the Euro: A Critical Perspective from the Left)