Deulofeu turned a number of heads last season having impressed while playing for Premier League side Everton, with the player praising his new loan club despite expecting to be spending this season at Barca.
"It's a very good club, I have high expectations and hopefully we can have a great year together," said Deulofeu, according to FIFA's official website.
"I was surprised by the decision that the manager took, but I'm going to enjoy this year very much. I want to focus on Sevilla."
Barcelona have also sent out youngster Denis Suarez to gain experience at Sevilla this season.