Summer NAMM is currently still scheduled for July 9–11, 2020.
An FAQ on NAMM's website says: "While no one truly knows what the future will bring in this rapidly-evolving health crisis, we hope that by July, the situation will have stabilized, and Summer NAMM will serve as an important gathering for our membership to unite and re-start the gears of commerce for our industry.
"However, this situation is constantly evolving. We will continue to follow the guidance of local state, and national authorities, as it relates to travel and public gatherings. Please know that we will keep you up to date regularly, and any changes to our upcoming events will be communicated directly and in a timely manner. The health and safety of our membership is our top priority."
NAMM will formally reassess the situation in mid-April 2020. For more information, visit: https://www.namm.org/summer/2020/