"I felt confident that the way I was playing in the D league I had confidence I would be with an NBA team soon," said Mensah-Bonsu.
"I'm excited to be in an NBA organisation with such class and history. I will hopefully have the chance to stay and represent my country.
"It's also kind of exciting and ironic as I grew up a Spurs (Tottenham) fan and now I'm going to be a Spur. Hopefully I will continue to be a Spur and maybe return to play for Tottenham Hotspurs as well!"
Head GB coach Chris Finch added: "I'm really happy and excited for Pops , his determination to create this opportunity for himself is nothing short of amazing. We wish him all the best and we all hope he will be able to turn this into a long-term NBA career. He certainly has it within him."
Mensah-Bonsu's return to the NBA means that Great Britain now have three internationals in the league, which is something the Londoner believes will only strengthen their position come Poland.
"We are a pretty talented group. We want to gain respect from the rest of the countries and then see where we can take it.
"Playing for GB is the high of my priority list. Last year was the first chance to play. I have always wanted to be first onboard. Now with us going to the EuroBasket finals I'm not going to let anything get in the way. I'm sure whatever team I'm with I will be able to get to Poland and represent my country."
