Sueña 3 is intended for students who already have a good knowledge of Spanish but still need to expand their vocabulary and master certain uses and grammatical constructions of greater complexity. It consists of 10 lessons, divided into clearly differentiated sections.

Each lesson begins with two pages dedicated to vocabulary, called "Words, Words." Next, there are two pages of grammar under the heading "Rules and Regulations." Several pages are presented face-to-face, where the student finds, on the left, the description and practice of grammatical uses, and on the right, activities aimed at developing, through conversation ("Bla, bla, bla"), those same uses, as well as various nocio-functional content. This offers both the teacher and students the opportunity to expand and reinforce written and oral expression.

After that, there are two pages of writing ("Take Note") that work on issues of spelling and text typology, followed by a page dedicated to phonetics ("Sounds Good"). Finally, the section dedicated to cultural content, "In Our Own Way," appears, along with two pages of Recapitulation.

The manual concludes with a Glossary, which includes the vocabulary studied in each of the "Words, Words" sections, translated into five languages: English, French, German, Italian, and Portuguese (with the Brazilian variant). Sueña 3 corresponds to the B2 level of the Framework. It includes 2 CDs with the audio exercises from the Student Book.