NSF Dear Colleague Letters (DCLs) are announcements from the U.S. National Science Foundation (NSF) that offer updates to existing NSF programs or encourage applicants of NSF existing grants to focus on specific areas of special interest to the agency.

Proposals for the Future of Designing Accountable Software Systems (DASS) 
NSF 25-026
Deadline: Concept outlines are due by 5 p.m. local time on February 3, 2025.
Invited EAGER proposals must be submitted by 5 p.m. local time on April 4, 2025.

Research Experiences for Undergraduates (REU) and Research Experiences for Teachers (RET) Supplemental Funding in Computer and Information Science and Engineering.
NSF 24-048
Deadline: March 31st each year. Funding requests submitted after this date may have limited availability.

Computer and Information Science and Engineering Graduate Fellowships (CSGrad4US)
NSF 24-033
Deadline: March 31st each year. Funding requests submitted after this date may have limited availability.

A New Supplemental Funding Opportunity for Skills Training in Advanced Research & Technology (START).
NSF 23-093
Deadline: Supplemental funding requests may be submitted at any time, with a target submission date of April 15th for consideration within the fiscal year.

Supplemental Funding Requests to Conduct Experimental Research on the NSF-funded Platforms for Advanced Wireless Research (PAWR)
NSF 24-100
Deadline: Supplemental funding requests are accepted any time, but the FY consideration deadline is June 15. This DCL remains active until June 15, 2026.

STEM Access for Persons with Disabilities (STEM-APWD).
NSF 23-160
Deadline: Submissions are due by 5 p.m. local time on the second Thursday of November.

Joint National Science Foundation and United States Department of Agriculture National Institute of Food and Agriculture Funding Opportunity: Supporting Foundational Research in Robotics (FRR)
NSF 24-080
Deadline as specified by the Foundational Research in Robotics program.

Special Guidelines for Submitting Collaborative Proposals under the National Science Foundation and Czech Science Foundation Collaborative Research Opportunities.
NSF 23-094
Deadline: Proposals must be submitted in accordance with the deadlines of the participating NSF programs.

Veterans Research Supplement (VRS) Program.
NSF 23-161
Deadline: There is no deadline for submissions of supplemental funding requests.

Inviting Proposals Related to Open-Source Software Security to the Secure and Trustworthy Cyberspace Program.
NSF 23-149
Deadline: Proposals may be submitted at any time.

Graduate Research Internships in Forensic Science and Criminal Justice Contexts (NSF-NIJ INTERN) Supplemental Funding Opportunity.
NSF 23-150
Deadline: Supplemental funding requests may be submitted at any time.

International Multilateral Partnerships for Resilient Education and Science System in Ukraine (IMPRESS-U).
NSF 23-135
Deadline: Proposals and supplemental funding requests may be submitted at any time. 

U.S.-UK Research Collaboration under the NSF-UKRI/Engineering and Physical Sciences Research Council Lead Agency Opportunity.
NSF 23-128
Deadline: Ongoing.

Special Guidelines for Submitting Collaborative Proposals in Cybersecurity under U.S. National Science Foundation (NSF) and Deutsche Forschungsgemeinschaft e.V. (German Research Foundation, DFG) Collaborative Research Opportunities.
NSF 23-051
Deadline: Proposals may be submitted at any time.

Graduate Research Internships in Forensic Science and Criminal Justice Contexts (NSF-NIJ INTERN) Supplemental Funding Opportunity
NSF 23-150
Deadline: Supplemental funding requests may be submitted at any time.

Inviting Proposals Related to Open-Source Software Security to the Secure and Trustworthy Cyberspace Program
NSF 23-149
Deadline: Proposals accepted at any time.

International Multilateral Partnerships for Resilient Education and Science System in Ukraine (IMPRESS-U)
NSF 23-135
Deadline: There are no deadlines for proposal submissions or supplemental funding requests under this DCL, so proposals and requests may be submitted at any time. All proposals and supplemental funding requests will be reviewed as soon as practical.

A proposer or NSF PI must contact and consult with an NSF Program Director in OISE and/or the relevant disciplinary program in advance regarding the content and timing of their submission.

U.S.-UK Research Collaboration under the NSF-UKRI/Engineering and Physical Sciences Research Council Lead Agency Opportunity
NSF 23-128
Deadline: Ongoing.

Special Guidelines for Submitting Collaborative Proposals under the National Science Foundation and Czech Science Foundation Collaborative Research Opportunities
NSF 23-094
Deadline: remains in effect until archived.

A New Supplemental Funding Opportunity for Skills Training in Advanced Research & Technology (START)
NSF 23-093
Deadline: Supplemental funding requests may be submitted at any time in FY2023 with a target date of June 15, 2023 to be reviewed for possible funding prior to October 1, 2023. For each subsequent fiscal year, supplemental funding requests may be submitted at any time with a target date of April 15th for possible funding in that Fiscal Year.

Special Guidelines for Submitting Collaborative Proposals in Cybersecurity under U.S. National Science Foundation (NSF) and Deutsche Forschungsgemeinschaft e.V. (German Research Foundation, DFG) Collaborative Research Opportunities
NSF 23-051
Deadline: Neither SaTC nor DFG have submission deadlines, so proposals may be submitted at any time.