BUCHAREST—On a recent day, nationalist politician Călin Georgescu made his way through a crush of people to enter a district court in Romania’s faded belle epoque capital to argue that he should be free to run in coming presidential elections.

A top Romanian court has rejected an appeal by far-right politician Calin Georgescu to lift a ban on his candidacy in the presidential rerun

The Romanian constitutional court on Tuesday upheld a ban preventing the far-right candidate Călin Georgescu from participating in the country’s presidential election. The ruling, which is final, backed a decision by Romania’s electoral authority on Sunday to throw out Georgescu’s bid to run in May’s vote after he allegedly breached election rules.