Isabel Marant designed a T-shirt for GAP's (PRODUCT)RED campaign, which raises money to support AIDS victims and promotes awareness of the disease. This collaboration took place in November 2011 and featured a slouchy, colorful design, reflecting Marant's signature style while contributing to a significant cause.

Isabel Marant announced a collaboration with Converse in September 2024, featuring a collection that introduces a reimagined wedge sneaker. This collection combines Isabel Marant's bohemian aesthetic with the classic Chuck Taylor design of Converse, reflecting a unique blend of style and innovation. Isabel Marant expressed her eagerness for the collection to launch, highlighting her enthusiasm for this partnership.

Isabel Marant collaborated with L'Oréal Paris in 2018 to create a capsule makeup collection that embodied her effortless Parisian chic aesthetic. This collection features essentials that reflect her design ethos, which has made her a notable figure in fashion known for her go-to pieces. The collaboration brought high fashion crossover into the cosmetics world, showcasing Marant's signature style.

Isabel Marant launched an exclusive High Summer '25 capsule collection with Net-a-Porter in May 2025. The collaboration was celebrated with an intimate event in Los Angeles, showcasing the unique offerings of this seasonal collection.