Mallorca finished fifth in La Liga last season and qualified for the Europa League but UEFA said that its Control and Disciplinary Body had decided the club had not fulfilled the admission criteria.
“…the licence of the club was not granted in accordance with the Uefa Club Licensing Regulations, 2008 edition, and the club has not fulfilled its obligations as defined in these regulations,” Uefa said in a statement on its website.
The reason appears to be that in May, Mallorca went into voluntary administration as a way to sort out their finances. A recent University of Barcelona study indicated that Mallorca had debts of around €85m (£71.7m).
Earlier this month Mallorca got some capital from the world No1 tennis player and Mallorca native Rafa Nadal and his uncle, the former professional footballer Miguel Angel Nadal, is assistant to the new coach Michael Laudrup.
UEFA decision seems to have caught Mallorca off guard. “Real Mallorca profoundly regrets the disappointment this decision by Uefa, which is hard to understand and without precedent, will cause among our fans,” a club statement said.