Private sector in the U.S. added 169,000 jobs in April, according the ADP report on Wednesday.
March's figure was revised down to 175,000 jobs from a previous reading of 189,000 jobs.
Analysts expected the private sector to add 200,000 jobs.
"Fallout from the collapse of oil prices and the surging value of the dollar are weighing on job creation," the Chief Economist of Moody's Analytics Mark Zandi said.
Official labour market data will be released on Friday. Analysts expect that U.S. unemployment rate is expected to decline to 5.4% in April from 5.5% in March. The U.S. economy is expected to add 224,000 jobs in April, after adding 126,000 jobs in March.