See what prominent Catalonians day about EU’s responsibility.
I’m with Catalonia.
This was prior to the military crackdown.
Catalonia's separatist government has called the vote for 1 October, and the Spanish government is trying to hinder the efforts.
Catalan foreign affairs representative Raul Romeva, speaking in Brussels said that EU institutions need to "understand that (the referendum) is a big issue."
Mr Romeva's comments came the day after Catalan regional president Carles Puigdemont accused the EU of "turning its back" on Catalonia in its conflict with Spain's central government.
The Spanish leadership has rejected the vote as illegal.
The mayor of Barcelona Ada Colau said the EU cannot remain passive on the disputed Catalan referendum.
She called on the EU Commission to mediate between Catalonia and the Spanish government, as the tensions grow.
She said: “Europe cannot allow itself to adopt a passive position over the Catalan question, seeing that the events going on in Barcelona are affecting Paris, Madrid, Brussels, and Berlin alike.”
Sunday's vote will be the region's second referendum for independence in three years.