Elton's boyfriend says the musician was devastated that he wasn't allowed to adopt an HIV-positive Ukrainian toddler, but plans to support the boy anyway.
The 62-year-old met 14-month-old Lev at a home for HIV-positive children in September. But he was refused permission to adopt the tot because he was too old and not married.
David Furnish said today the couple was "massively gutted" by the rejection.
He told BBC Radio 5 they were working to ensure Lev and his brother "have the best health care, education and family options available to them."
Elton and David tied the knot in 2005 in a civil union in Britain. Ukrainian authorities do not recognize gay unions as marriage.
Furnish said the couple would campaign for a change in Ukrainian law.
He also spoke about George Michael, saying that the singer's pals keep calling and saying 'you have to do something, George is in a bad way.'
"If he doesn't want help or... doesn't think he needs help, that's fine."
On Saturday, Michael had said, upon hearing that the Rocket Man was concerned about him, "Elton needs to get on with his own life."
Michael has admitted a past addiction to prescription drugs and said he is still a regular cannabis user.