Globally, there are more than 380,000 confirmed cases of coronavirus and 17, 226 deaths.
"I think it was a mistake to allow the large geographical dispersion of people that occurred in the days before the lockdown came into effect, and this may have facilitated the spread of the virus", said Pere Godoy, president of the Spanish Epidemiology Society.
"By Easter we'll have a recommendation and maybe before Easter", added Trump, who had been touting a strong U.S. economy as he faces an election in November.
COVID-19: New Zealand declares national emergency as country records 205 cases
People are ordered to stay inside and non-essential services are being shut down, coming as the number of cases rises to 205 today.
As of 1100 GMT on Wednesday, the number of deaths around the world from the new coronavirus strain stood at 19,246, with more that 427,000 declared cases registered in 181 countries and territories.
Meanwhile, almost 130 million Americans, or 40 per cent of the population, are under or will soon come under some lockdown order, including in the largest state of California. The result is that more than 10 per cent of confirmed cases in Spain are among medical staff, further reducing the capacity of a healthcare system already at breaking point.
The call is likely to fall on deaf ears when European Union leaders talk on Thursday - with northern members wary of pooling debt with big spenders - but they will sign off on an "unprecedented" recovery plan.
These figures bring Spain's death toll to 3,434.
Spain is among the countries that have been hit the hardest by the virus.
But financial markets rose after USA leaders agreed a stimulus package worth roughly 10 percent of their economy, an injection Senate Majority Leader Mitch McConnell said represented a "wartime level of investment".