Watch: Levis Davis' mother has appealed for him to come home
His foster mother Julie Davis, 51, said on Good Morning Britain: "Levi if you see this message, please, please get in touch.
"I can't begin to understand how you're feeling, but just know that I do love you and our family loves you and just want you home. And to anybody else if they do see him, please get in contact."
Anyone with information can email firstname.lastname@example.org .
Davis was said to have struggled with his mental health, and coming out as bisexual.
He had considered quitting rugby after suffering an anterior cruciate ligament injury that required surgery and stopped him from being able to play.
He had also spoken about financial problems and racism within the rubgy world.
CCTV footage shows him entering the Old Irish Pub in Barcelona at 10.05pm on 29 October, wearing a white short-sleeved T-shirt, black trousers and black and white trainers, carrying a small black rucksack.
Julie said: "Levi said, ‘I need to just sort my head out and have some time to refresh myself’.
“He had recently had an ACL injury and he thought that was a good time for him to go.”
“For him it was going from doing something to suddenly not doing a lot.” I think given the state he was in, I think he’s probably deteriorated.
“The fact he would normally be in touch with me on a day to day basis or his friends makes it even more concerning.”
Davis appeared alongside fellow rugby stars Ben Foden and Thom Evans in a singing group known as Try Star on Celebrity X Factor in 2019. They came fifth in the singing contest.
Foden reshared an appeal for information on Davis' whereabouts on Twitter.