| Cabinet Name: | Third Dudley Senanayake cabinet |
| Cabinet Number: | 8th |
| Jurisdiction: | Ceylon |
| Flag: | Flag of Ceylon (1951–1972).svg |
| Flag Border: | true |
| Date Formed: | 25 March 1965 |
| Date Dissolved: | 29 May 1970 |
| Government Head Title: | Prime Minister |
| Government Head: | Dudley Senanayake |
| State Head Title: | Monarch |
| State Head: | Elizabeth II |
| Political Parties: | Supported by: |
| Opposition Leader: | Sirimavo Bandaranaike |
| Election: | 1965 |
| Last Election: | 1970 |
| Legislature Term: | 6th |
| Previous: | Sirimavo Bandaranaike I |
| Successor: | Sirimavo Bandaranaike II |
The Third Dudley Senanayake cabinet was the central government of Ceylon led by Prime Minister Dudley Senanayake between 1965 and 1970. It was formed in March 1965 after the parliamentary election and it ended in May 1970 after the opposition's victory in the parliamentary election.
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| scope=col colspan="2" | Name | scope=col class=unsortable | Portrait | scope=col | Party | scope=col width=300px | Office | scope=col | Took office | scope=col | Left office | scope=col width=50px class=unsortable | Refs |
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| Parliamentary Secretary to the Minister of State | |||||||||||||
| Parliamentary Secretary to the Minister of Home Affairs | |||||||||||||
| Parliamentary Secretary to the Minister of Communications | |||||||||||||
| !align="center" style="background:;" | Parliamentary Secretary to the Minister of Agriculture and Food | ||||||||||||
| Parliamentary Secretary to the Minister of Industries and Fisheries | |||||||||||||
| Parliamentary Secretary to the Minister of Labour, Employment and Housing | |||||||||||||
| !align="center" style="background:;" | Parliamentary Secretary to the Minister of Education and Cultural Affairs | ||||||||||||
| !align="center" style="background:;" | Parliamentary Secretary to the Minister of Defence and External Affairs | March 1965 | |||||||||||
| Parliamentary Secretary to the Minister of Health | |||||||||||||
| Parliamentary Secretary to the Minister of Justice | |||||||||||||
| Parliamentary Secretary to the Minister of Public Works, Posts and Telecommunications | |||||||||||||
| Parliamentary Secretary to the Minister of Social Services | |||||||||||||
| Parliamentary Secretary to the Minister of Commerce and Trade | |||||||||||||
| !align="center" style="background:;" | Parliamentary Secretary to the Minister of Home Affairs | March 1965 | 1966 | ||||||||||
| !align="center" style="background:;" rowspan=2 | align=center rowspan=2 | Parliamentary Secretary to the Minister of Information and Broadcasting | |||||||||||
| Parliamentary Secretary to the Minister of Local Government | |||||||||||||
| Parliamentary Secretary to the Minister of Land, Irrigation and Power | |||||||||||||
| !align="center" style="background:;" | Parliamentary Secretary to the Minister of Nationalised Services | ||||||||||||
| Parliamentary Secretary to the Minister of Finance |