“The Expendables 3” was released on DVD/Blu-ray in the UK on December 8, 2014. The Blu-ray comes with an extended edition as well as the theatrical version while the DVD comes only with the theatrical version. You can buy it online here.
Our team member, Malgorzata, let us know that “The Expendables 3” is now also available on DVD/Blu-ray in Poland. Both formats were released on December 4, 2014 and you can find more information about it here.