There will be no “Barbie” world in Vietnam this summer.

The Southeast Asian nation has banned the release of “Barbie,” the upcoming film directed by Greta Gerwig, because of a scene that includes the so-called nine-dash line, a U-shaped dotted line on a map showing territory in the South China Sea that both China and Vietnam claim as their own.

The nine-dash line is used in Chinese maps to mark its claim over as much as 90 percent of the South China Sea.

While an international tribunal at The Hague ruled in 2016 that China had no legal basis for its claims, Beijing has yet to concede to the ruling and has instead sought to dominate the waters, carrying out aggressive incursions and developing military installations.

Vietnam, with its long-held acrimonious ties to China, said on Monday that the new film would not be released in the country because of its use of the line, according to Vi Kien Thanh, the head of the Vietnam Cinema Department. The decision was made by the National…