The private group's report is "a troubling sign" two days before the Bureau of Labor Statistics issues its figures on April employment growth and unemployment, The Associated Press says.
A large 0.9 percent gain in consumer spending from January to February was followed by a more modest 0.3 percent increase from February to March, the Bureau of Economic Analysis says.
Personal income, meanwhile, was up 0.4 percent in March. It had risen 0.3 percent in February.