The event will run from 10 a.m. to 4 p.m. at Columbus Coffee Co cafe near Upper Thomson MRT station, Channel News Asia reported.
Three types of burgers will be available in limited quantities at the event including the Double-Double, Protein Style and Animal Style, The Straits Times reported.
The Double-Double includes two beef patties, two slices of American cheese and greens while the Protein Style features a burger wrapped in lettuce in place of a bun, and the Animal Style comes with extra pickles, spread and grilled onions.
In March 2019, a similar event was held in Singapore as hundreds of burger fans waited for hours to try its offerings.
In 2022, the chain drew a massive crowd of burger lovers in Vietnam after it opened a pop-up event in HCMC’s District 1.
In-N-Out Burger was first opened in 1948 by Canadian-born businessman Harry Snyder and his wife Esther.
The burger chain is yet to establish an outlet outside of the U.S. but has opened pop-up locations across the world such as Sydney, Tokyo and Singapore.