Marín said that the issues for her new mandate were the Spanish economic crisis and the entrance into the city hall of the far-right Platform for Catalonia.

In November that year, she formed a pact with two independent councillors elected as members of Guanyem Catalunya, still one short of a majority.

[4] In 2017, following the presentation of the unrecognised Catalan declaration of independence, Marín called for Carles Puigdemont, the President of the Government of Catalonia, to confirm that he was not seeking secession, as to avoid the application of Article 155 of the Constitution of Spain being triggered.

[5] In the 2019 Spanish local elections, Marín recovered the majority in the city hall that her party had lost eight years earlier, by increasing their seats from 11 to 14 out of 27.

[8] In the 2023 Spanish local elections, her party was the most voted in each neighbourhood of L'Hospitalet de Llobregat, but nonetheless lost its majority.

Formerly vice secretary to PSC leader Miquel Iceta, she replaced Àngel Ros as party president in December 2019.