The company said in a statement on Tuesday that it would not be able to meet its quarterly revenue target of US$63 billion to US$67 billion (A$93.8 billion to A$99.8 billion) due to the shortage of iPhones and a falloff of sales in China.
But it did not offer any new figure for the March revenue forecast.
Apple issued an earnings guidance on 29 January, and said this had been issued based on "the best information available at the time as well as our best estimates about the pace of return to work following the end of the extended Chinese New Year holiday on 10 February".
"The health and well-being of every person who helps make these products possible is our paramount priority, and we are working in close consultation with our suppliers and public health experts as this ramp continues," Apple said.
"These iPhone supply shortages will temporarily affect revenues worldwide."
Demand for iPhones in China had been affected because all Apple stores in the country, plus many partner stores, had been closed.
"Additionally, stores that are open have been operating at reduced hours and with very low customer traffic," Apple said.
"We are gradually reopening our retail stores and will continue to do so as steadily and safely as we can. Our corporate offices and contact centres in China are open, and our online stores have remained open throughout."
However, the company said demand outside China across the product and service categories had been strong to date and in line with expectations.