PARIS — French President Emmanuel Macron scrapped a fuel tax rise Wednesday amid fears of new violence, after weeks of nationwide protests and the worst rioting in Paris in decades.

Protesters celebrated, but some said Macron’s surrender came too late and is not enough to quell the mounting anger at the president, whom they consider out of touch with the problems of ordinary people.

Macron decided Wednesday to ‘‘get rid’’ of the tax planned for next year, the president’s office said. Prime Minister Edouard Philippe told lawmakers the tax is no longer included in the 2019 budget.

The decision has ramifications beyond France, since a higher fuel tax was part of Macron’s effort to wean France off fossil fuels to reduce greenhouse gases and slow climate change. Its withdrawal is both a blow to broader efforts to fight climate change and a warning to other world leaders trying to do the same thing.

The ‘‘yellow vest’’ protests began Nov. 17 over the government’s plan to raise taxes on diesel and gasoline, but by the time Macron bowed to three weeks of violence, protesters were demanding much more. Workers are angry about the low wages, high taxes, and high unemployment that have left many struggling financially.

On Tuesday, the government agreed to suspend the fuel tax rise for six months. But instead of appeasing the protesters, it spurred other groups to join in, hoping for concessions of their own. The protests took on an even bigger dimension Wednesday, with trade unions and farmers vowing to join the fray.

Philippe said ‘‘the tax is now abandoned’’ and the government is ‘‘ready for dialogue.’’ The budget can be renegotiated through the year, but given the scale of the protests, Macron is unlikely to revive the fuel tax idea anytime soon.

Jacline Mouraud, one of the self-proclaimed spokeswomen for the disparate yellow vest movement, said Macron’s concession ‘‘comes much too late, unfortunately.’’

‘‘It’s on the right path, but in my opinion it will not fundamentally change the movement,’’ she said.

Three weeks of protests have caused four deaths, injured hundreds, and littered central Paris with burned cars and shattered windows.

The sweep of the protests and their wide support by citizens of all political stripes has shocked Macron’s government. In the last few days, Paris saw the worst anti-government riot since 1968. French students set fires outside high schools to protest a new university application system, small-business owners blocked roads to protest high taxes, and retirees marched to protest the president’s perceived elitism. His popularity has slumped since the demonstrations began. The former investment banker, who has pushed pro-business measures to make France more competitive, is accused of being the ‘‘president of the rich.’’

On Wednesday, France’s largest farmers union said it will launch anti-government protests next week, after trucking unions called for a strike.

Trade unions so far have not played a role in the yellow vest protest movement but are now trying to capitalize on growing public anger. A joint statement from the CGT and the FO trucking unions called for action Sunday night to protest a cut in overtime rates.

The FNSEA farmers union said it would fight to help French farmers earn a better income but would not officially join forces with the yellow vests — protesters wearing the safety vests motorists keep in cars.