Finland and Great Britain booked their spots in Division A with convincing wins on Saturday.
After a big win at home earlier in the week Great Britain visited Geneva and came away with an 89-78 victory which secured a 163-119 aggregate win.
Romania left themselves with a seven point cushion in their EuroBasket Division B tie with Finland, scoring an 83-76 win in the first of two games between the teams to decide who will ascend to Division A.
The Romanians grabbed the early lead and slowly built on it.
A team-mate now stands in the way of Luol Deng fulfilling his international ambitions this summer.
In the last two months, the Chicago Bulls star has led Great Britain to four straight wins, allowing the Brits to force their way into a two-game play-off for promotion into Europe's Division A of basketball nations.