If budget funding does not pass by Wednesday, the government will experience a shutdown. Economically, this news imposes a threat to the release of critical economic data. The Bureau of Labor Statistics will be closed and the release of key economic data would be delayed. Most critically, this includes the September jobs report, the Consumer Price Index, and key wage data. This would effect the operations of the Federal Reserve who rely heavily on these figures for their policy decisions. Additionally, this would more prominently effect investor sentiments and would likely lead to a shake up in the financial markets which respond more instantaneously to current news.
In the past, government shutdowns have not been the catalysts to severe economic issues like recessions; however, this shutdown poses a different threat due to the calls for mass firing of federal workers. This would make an impact as the key issue the Federal Reserve is addressing is the weakening labor market. Mass firing of government employees would lead to a compounding of this issue.
https://thehill.com/business/5526916-government-shutdown-economic-data/