SEM Instruction 3/2025, published by the Ministry of Inclusion, Social Security and Migration, is a fundamental step in the practical application of the new Royal Decree 1155/2024, which regulates the immigration regime in Spain. In this article I analyze its main novelties, what they imply for foreign students and what is my professional assessment. 1. What does this instruction regulate? SEM Instruction 3/2025 clarifies how to process long-term stay authorizations for studies, student mobility, volunteer services or training activities.…