Toronto - IAMGOLD Corporation (TSX: IMG) (NYSE: IAG) ('IAMGOLD' or the 'Company') is pleased to announce assay results from its delineation diamond drilling program at the Gosselin Zone discovery, located approximately 1.5 kilometres northeast of the Cote Gold Project ('Cote', 'Project').

The Gosselin delineation drilling program is being undertaken as part of the Cote Gold Joint Venture Project, a 70:30 joint venture between IAMGOLD and Sumitomo Metal Mining Co., Ltd. ('SMM'). Cote, located 125 km southwest of Timmins and 175 km north of Sudbury, Ontario, Canada, is currently under construction with first gold production anticipated in the second half of 2023.

Since the fourth quarter of 2019, a total of thirty-three (33) diamond drill holes totaling 13,735 metres were completed as part of the resource delineation drilling program. The drill holes were variably completed from collar positions located on either lake ice, or on a floating barge deployed in Three Ducks Lake and from land based drill pads on the north shore of Three Ducks Lake or on the Young-Shannon peninsula.

IAMGOLD is reporting assay results from twenty-four (24) diamond drill holes totaling 10,049 metres. Results are pending for the remaining nine (9) drill holes totaling 3,686 metres. These results will be reported once they are received, validated and compiled.

CAUTIONARY STATEMENT ON FORWARD-LOOKING INFORMATION

This news release contains forward-looking statements. All statements, other than of historical fact, that address activities, events or developments that the Company believes, expects or anticipates will or may occur in the future are forward-looking statements. Forward-looking statements are generally identifiable by, but not limited to, the use of the words 'may', 'will', 'should', 'continue', 'expect', 'budget', 'forecast', 'anticipate', 'estimate', 'believe', 'prospective', 'significant', 'potential', 'significant potential', 'substantial', 'transformative', 'intend', 'plan' or 'project' or the negative of these words or other variations on these words or comparable terminology. Forward-looking statements are subject to a number of risks and uncertainties, many of which are beyond the Company's ability to control or predict, that may cause the actual results of the Company to differ materially from those discussed in the forward-looking statements. Factors that could cause actual results or events to differ materially from current expectations include, among other things, without limitation, failure to meet expected, estimated or planned gold production, unexpected increases in all-in sustaining costs or other costs, unexpected increases in capital expenditures and exploration expenditures, variation in the mineral content within the material identified as Mineral Resources and Mineral Reserves from that predicted, changes in development or mining plans due to changes in logistical, technical or other factors, the possibility that future exploration results will not be consistent with the Company's expectations, changes in world gold markets and other risks disclosed in IAMGOLD's most recent Form 40-F/Annual Information Form on file with the United States Securities and Exchange Commission and Canadian securities regulatory authorities. Any forward-looking statement speaks only as of the date on which it is made and, except as may be required by applicable securities laws, the Company disclaims any intent or obligation to update any forward-looking statement. The Company disclaims any intention or obligation to update or revise any forward-looking statements whether as a result of new information, future events or otherwise except as required by applicable law.

About IAMGOLD

IAMGOLD is a mid-tier mining company with three gold mines on three continents, including the Essakane mine in Burkina Faso, the Rosebel mine in Suriname, and the Westwood mine in Canada. A solid base of strategic assets is complemented by the Cote Gold construction project in Canada, the Boto Gold development project in Senegal, as well as greenfield and brownfield exploration projects in various countries located in West Africa and the Americas. IAMGOLD aims to become a million-ounce gold producer as it executes on its growth strategy, including bringing Cote Gold, its fourth mine, online.

IAMGOLD is committed to maintaining its culture of accountable mining through high standards of ESG practices and employs approximately 5,000 people. IAMGOLD's commitment is to Zero Harm, in every aspect of its business. IAMGOLD is one of the companies on the JSI index.

IAMGOLD is listed on the Toronto Stock Exchange (trading symbol 'IMG') and the New York Stock Exchange (trading symbol 'IAG').

Contact:

Indi Gopinathan

Tel: (416) 360-4743

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